Email apps have become essential tools for staying connected in our increasingly digital world. With billions of people managing multiple email accounts across personal, work, and school, the demand for powerful, reliable email clients has exploded. From simple inbox managers to comprehensive communication platforms with calendar integration and AI assistance, the email app market offers something for everyone.
Many developers—from tech giants like Google and Microsoft to privacy-focused startups like Proton and independent open-source developers—have created email apps that range from minimalist IMAP clients to feature-packed productivity suites. Of course, established players and newcomers alike are competing fiercely, each trying to win users with their unique approach to email management.
This is a comparison of 10 iOS & Android email apps, built from their store listings, their ratings and what recent reviews report.
How this list was made: the scores come from Productivity Apps, a review site run by my company — the same one that makes Web Highlights. It rates each app from its App Store and Google Play listings, its ratings and what recent reviews report, and this list is ordered by that score, with Gmail and Microsoft Outlook level at 8.33/10. The descriptions below summarize each listing and what its users report. Store figures come from the App Store and Google Play as crawled on October 22–23, 2026; scores and vendor prices were read on November 4, 2026.
List of the Best Email Apps for Android & iOS:
- FairEmail, privacy aware email
- Email - Fast & Secure Mail
- Gmail
- Microsoft Outlook
- Proton Mail: Encrypted Email
- Email Blue Mail - Calendar
- Thunderbird: Free Your Inbox
- Spark Mail: AI Email, Calendar
- Canary Mail - AI Email App
- Yahoo Mail
If you prefer a comparison overview, check out the full comparison table of all Email apps:
1. FairEmail, privacy aware email
FairEmail has carved out a passionate following among privacy-conscious users and power users who demand comprehensive email management. With over 1 million downloads and a 4.6-star rating on Android (with 30,700+ reviews), it's clear that many users appreciate its uncompromising approach to privacy and features. Recent feedback has settled level with that average: the last 100 reviews come to 4.59, after running well ahead of it earlier.
What really sets FairEmail apart is its 100% open-source architecture combined with exceptional developer support. Reviewers report that Marcel (the developer) personally responds to support emails, often fixing bugs within hours and implementing thoughtful feature requests same-day. This level of direct engagement is virtually unheard of in the email app market.
Key Features:
- 100% Open Source & Privacy-Focused – No data storage on third-party servers, no ads, no analytics, no tracking (even error reporting is opt-in)
- Tracker & Phishing Protection – Blocks embedded tracking images, confirms before loading images/links, reformats messages to prevent phishing
- Full Encryption Support – OpenPGP and S/MIME encryption/decryption built-in for secure communications
- Unlimited Accounts & Unified Inbox – Connect unlimited email addresses with optional unified view or separate folder organization
- Advanced Filtering & Rules – Automatic message classification, filter rules, search indexing, colored stars and account/folder customization (Pro)
- Power User Features – Reply templates, scheduled sending, snooze messages, conversation threading, two-way sync, offline operations
- Lightweight & Battery-Friendly – Under 30 MB app size with IMAP IDLE push support, minimal battery drain, low data usage
- Developer-Supported – Direct email support from Marcel, same-day bug fixes, active maintenance since 2019
Pros & Cons
Pros:
- 100% open source
- One-time $7.49 payment
- Exceptional developer support
- Blocks email trackers
- Unlimited free accounts
- OpenPGP/S/MIME encryption
- Infinitely configurable
- Lightweight & fast
Cons:
- Busy UI for some users
- Learning curve for features
- Outdated design aesthetics
- Occasional Outlook auth issues
Who is this great for?
FairEmail is perfect for anyone who values privacy, open-source transparency, and needs comprehensive email management without compromises. Whether you're a security-conscious professional, a privacy advocate who wants to know exactly what your email app does with your data, or a power user who needs advanced filtering and encryption, FairEmail delivers without artificial limitations.
It's especially great for users who want lifetime access through a one-time $7.49 payment instead of subscriptions, and for anyone who'd rather not have an email app track them. The exceptional developer support makes it ideal for users who value responsive maintenance and direct communication with the creator.
Compared to others
FairEmail stands out for its uncompromising privacy focus and open-source architecture when compared to mainstream apps like Gmail or Microsoft Outlook. While Proton Mail also emphasizes privacy, FairEmail provides more configuration options and works with any email provider. Compared to Thunderbird, FairEmail has far stronger recent Android reviews (4.59 for the last 100 against 3.22).
Detailed comparisons
FairEmail vs Gmail • FairEmail vs Proton Mail • FairEmail vs Thunderbird
Rating Summary
With 1 million+ downloads and 30,700+ reviews on Android, FairEmail has built a dedicated user base that values privacy and power. ProdApps gave FairEmail a score of 8.72/10. Check out the full review here.
2. Email - Fast & Secure Mail
Edison Mail (marketed as "Email - Fast & Secure Mail") sells itself on speed and smart organization. With over 10 million downloads, it holds 4.5 stars on Android (with 324,000+ reviews) and 4.5 on iOS. Recent reviews split by platform, though: the last 100 average 4.32 on Android and 2.98 on iOS.
What stands out in Edison's listing and reviews is the balance of advanced features—like package tracking, bill reminders, and smart assistant capabilities—with speed. The listing promises email fetching faster than other mail apps, and reviewers describe the smart categorization as effective without feeling intrusive. The recent complaints are about notifications that arrive before the mail does, attachments that won't add or save, and upgrade prompts, and most of that is worse on iOS. Edison has also retired its desktop app, so this is a mobile-only client now.
Key Features:
- Unified Inbox for Unlimited Accounts – Connect unlimited Gmail, Outlook, Yahoo, iCloud, Office 365, Exchange, AOL, and IMAP accounts in a single view
- Fast Email Fetching – Its listing says it fetches email faster than other mail apps, citing its own speed tests
- One-Tap Unsubscribe – Clear newsletter clutter with a single tap
- Edison Mail Assistant – Automatic organization of bills, receipts, entertainment, travel, and package delivery notifications (US/UK on Android; also Canada, Australia and India on iOS)
- Focused Inbox with Smart Organization – Automatic email categorization to prioritize important messages and reduce inbox distractions
- Customizable Actions & Templates – Configure swipe gestures, create custom email templates, adjust color schemes, and personalize your workflow
- Block Sender & Phishing Protection – Block unwanted senders and get phishing protection; rules and keyword or domain blocking sit in Edison Mail+
- Search & Quick Access – Fast search for subscriptions, travel plans, bills, packages, and important information across all accounts
Pros & Cons
Pros:
- Generous free tier
- Fast fetching on Android
- One-tap unsubscribe
- Unlimited account support
- Easy setup and use
- Beautiful, customizable design
Cons:
- Notification arrives before mail
- Attachments fail to add or save
- Pushy upgrade prompts on iOS
- Outlook/Yahoo connection issues
- Desktop app discontinued
- No offline functionality
Who is this great for?
Edison Mail is perfect for anyone who values speed above all else and wants smart assistant features that actually work. Whether you're managing multiple email accounts, tracking frequent online orders, or need quick inbox cleanup tools, Edison delivers a polished experience that Android reviewers describe as fast.
It's especially great for users who receive lots of bills, shipping notifications, and subscriptions—Edison's automatic categorization and tracking features save significant time managing these emails. The app works well for users who want more assistant features than Gmail with less complexity than power-user tools, and it's on firmer ground on Android than on iOS.
Compared to others
Edison Mail differentiates itself through speed and smart assistant features compared to Gmail or Microsoft Outlook. While Blue Mail offers similar multi-account management, users find Edison much faster. Compared to privacy-focused FairEmail, Edison trades some privacy for convenience features like package tracking.
Detailed comparisons
Edison Mail vs Gmail • Edison Mail vs Blue Mail • Edison Mail vs Outlook
Rating Summary
With 10 million+ downloads and 324,000+ reviews on Android, Edison Mail has proven its appeal to speed-focused users. ProdApps gave Edison Mail a score of 8.53/10. Check out the full review here.
3. Gmail
Gmail is the default email app for much of the world, and for good reason. With 10 billion+ downloads, a 4.1-star rating on Android across 14.5 million reviews (4.06 for the last 100) and 4.7 stars on iOS (1.61 for the last 100), it's the email client most people rely on daily. That iOS gap comes from the 6.0 redesign that spread in mid-October, which reviewers say makes unread mail harder to spot and fits less on screen.
What keeps Gmail ahead of the competition is its combination of core reliability and smart productivity features that don't feel forced. Reviewers call its search unmatched, say inbox categories reduce clutter automatically, and note that Smart Compose speeds up writing without requiring separate AI subscriptions. When everything works properly, Gmail provides the most frictionless email experience available.
Key Features:
- Best-in-Class Search – Fast, accurate search across emails and attachments with advanced filters and optional Gemini assistance
- Smart Inbox Categories – Automatic separation of Primary, Social, Promotions, and Updates for faster email triage
- Industry-Leading Spam Protection – Blocks more than 99.9% of spam, phishing, and malware, according to its listing
- Multi-Account Support – Add Gmail plus other providers (Outlook, Yahoo, IMAP) in unified inbox view
- Smart Compose & Reply – AI-powered writing suggestions and one-tap contextual responses
- Google Ecosystem Integration – Seamless Calendar, Tasks, Meet, and Drive integration within email interface
- Centralized Unsubscribe – Manage all newsletter subscriptions in one place with easy opt-out
- Offline Access – Read and compose emails without connection, sync automatically when online
Pros & Cons
Pros:
- Best-in-class search
- Excellent spam filtering
- Completely free
- Multi-account support
- Fast setup and sync
- Reliable cross-device access
Cons:
- Notifications fail for some
- iOS redesign hurts readability
- 15GB limit can block mail
- Calendar auto-add surprises
- Occasional app crashes
- Account recovery friction
- Privacy trade-offs
Who is this great for?
Gmail is perfect for anyone who wants a reliable all-around email app without paywalls. Whether you're a casual user managing one account or a professional juggling multiple email addresses, Gmail delivers. The deep Google ecosystem integration makes it ideal for users already using Google Calendar, Drive, or Meet.
It's especially great for users who prioritize search functionality, spam protection, and just wanting email that "works" without configuration. Gmail is the safest default choice for users who don't have specific privacy requirements or need for advanced customization. On iPhone, the recent redesign is the main thing to check before you settle on it.
Compared to others
Gmail provides a solid baseline email experience compared to alternatives. While Proton Mail offers superior privacy, Microsoft Outlook provides better Microsoft ecosystem integration, and FairEmail delivers more customization, Gmail is the simplest choice for most users, though iPhone users should check the new design first.
Detailed comparisons
Gmail vs Outlook • Gmail vs Proton Mail • Gmail vs Edison Mail
Rating Summary
With 10 billion+ downloads and 14.5 million reviews on Android, Gmail is the biggest app in this comparison. ProdApps gave Gmail a score of 8.33/10, level with Microsoft Outlook. Check out the full review here.
4. Microsoft Outlook
Microsoft Outlook brings Microsoft's enterprise email platform to mobile with 1 billion+ downloads, a 4.3-star rating on Android across 10.7 million reviews (4.39 for the last 100) and 4.8 stars on iOS (3.94 for the last 100). The app excels at Microsoft ecosystem integration—for business users, teams, and anyone invested in Microsoft services, Outlook provides unified inbox management, powerful calendar scheduling, and seamless Office document access all in one app.
Reviews suggest Outlook delivers on its productivity promise for users who need Microsoft integration. Users rate its calendar management above most competitors, call Office document handling genuinely useful, and find the Focused Inbox feature effective at reducing email noise. The recent record is uneven, though. Android has climbed back from a rough August, and the sharper complaints now come from iOS: a late-September update that crashed the app, a delete icon moved behind a menu, and an Apple Watch complication broken since August. On both platforms, reviewers report unreliable search, the Copilot button, and drafts that fail to save.
Key Features:
- Unified Multi-Account Inbox – Manage Gmail, Yahoo, iCloud, Exchange, and IMAP accounts in one seamless interface
- Focused Inbox – AI-powered filtering that separates important emails from low-priority messages automatically
- Integrated Calendar & Tasks – Schedule meetings, set reminders, and manage to-do lists without leaving the email interface
- Microsoft 365 Integration – Open Word, Excel, PowerPoint documents directly from inbox with native editing support
- Intelligent Swipe Gestures – Customize swipe actions for delete, archive, snooze, move, or flag with one motion
- Teams & Video Call Integration – Join Microsoft Teams, Zoom, or other video meetings directly from calendar invites
- Play My Emails – Voice-powered email reading for hands-free inbox management while driving or multitasking
- Smart Search – Search across emails, attachments, contacts, and calendar events with voice or text queries
Pros & Cons
Pros:
- Excellent Microsoft 365 integration
- Free multi-account support
- Powerful calendar management
- Clean professional design
- Focused inbox works well
- Strong business features
Cons:
- Forced Copilot button
- Updates that break things
- Weak spam filtering
- Confusing delete behavior
- Search reliability problems
- Ads in the free version
Who is this great for?
Microsoft Outlook is perfect for business users, professionals, and anyone already invested in Microsoft's ecosystem who needs tight Office integration, calendar scheduling with Teams, or enterprise email management. Whether you're coordinating meetings, collaborating on Office documents, or managing work and personal accounts in one place, Outlook delivers seamless Microsoft productivity.
It's especially great for users who need calendar-focused workflows, teams relying on Microsoft 365 for collaboration, and professionals who want a business-class email experience. The free tier covers mail, calendar and multiple accounts, with ads in the inbox list that a Microsoft 365 subscription removes. For Office-centric work, Outlook provides integration that Gmail can't match.
Compared to others
Outlook excels at Microsoft ecosystem integration compared to Gmail or Edison Mail. While Gmail offers better spam filtering, Outlook provides tighter Office, OneDrive, and Teams integration, and the two are level on score. Compared to Proton Mail, Outlook trades privacy for productivity features.
Detailed comparisons
Outlook vs Gmail • Outlook vs Proton Mail • Outlook vs Edison Mail
Rating Summary
With 1 billion+ downloads and 10.7 million reviews on Android, Outlook remains a top business email choice. ProdApps gave Microsoft Outlook a score of 8.33/10, level with Gmail. Check out the full review here.
5. Proton Mail: Encrypted Email
Proton Mail positions itself as the gold standard for private, encrypted email, and it largely lives up to that reputation. With over 10 million downloads on Android, a 4.5-star rating across 95,600+ reviews and 4.8 stars on iOS, the app has built a loyal following among security-conscious users. What sets Proton apart is its uncompromising commitment to privacy—end-to-end encryption, zero-access architecture, Swiss-based servers under strict privacy laws, and open-source cryptography independently audited.
According to Proton's listing, encryption works transparently for Proton-to-Proton emails, with password-protected messages available for non-Proton users. The listing also describes an offline mode, and the Easy Switch feature promises to make migrating from Gmail, Outlook, or Yahoo straightforward. Recent reviews run below those averages, however: the last 100 come to 3.72 on Android, up from 3.36 over the last 500 after a rough late summer, and 3.11 on iOS. Login issues, UI quirks, and limits in the free tier are the common complaints.
Key Features:
- End-to-End Encryption – All messages stored with zero-access encryption, making them unreadable to anyone except you and your recipients
- Password-Protected Emails – Send encrypted messages to non-Proton users with password protection
- Proton Easy Switch – Migrate emails, calendars, and contacts from Gmail, Outlook, Yahoo, iCloud, or AOL in just a few taps
- Gmail Connect & Auto-Forwarding – Use your Gmail address alongside your Proton email in one inbox, or forward from as many Gmail accounts as you like
- Multi-Account Support – Manage multiple Proton Mail accounts within a single app interface
- Advanced Spam & Phishing Protection – Built-in filtering keeps malicious emails out of your inbox
- Folders, Labels & Private Categories – Keep your inbox organized with customizable folders, labels, swipe gestures, and automatic categories
- Open-Source Cryptography – Vetted security implementations using AES, RSA, and OpenPGP standards
Pros & Cons
Pros:
- Industry-leading encryption
- Strong privacy commitment
- No ads or tracking
- Open-source security
- Easy Gmail migration
- Works fully offline
Cons:
- Recent reliability problems
- Login/setup issues reported
- Not a multi-provider client
- IMAP bridge paywalled
- Limited free storage
- Confusing conversation threads
Who is this great for?
Proton Mail is perfect for anyone serious about protecting their communications from surveillance, data harvesting, or third-party tracking. Whether you're a privacy advocate, journalist, activist, security-conscious professional, or anyone handling sensitive communications, Proton delivers encryption and privacy that mainstream apps can't match.
It's especially great for users willing to move to a Proton address in exchange for uncompromising privacy, and for anyone seeking transparent, open-source security they can verify. The free tier gives you up to 1 GB of storage and 150 messages a day; paid plans add more storage and custom domains.
Compared to others
Proton Mail is the privacy leader compared to mainstream apps like Gmail or Microsoft Outlook, which can technically access your emails. While FairEmail also emphasizes privacy, Proton provides built-in encryption rather than relying on external email providers. However, Proton is built around a Proton account, and Gmail is the only outside mailbox it lets you bring along, so it's not a multi-provider client like most alternatives.
Detailed comparisons
Proton Mail vs Gmail • Proton Mail vs Outlook • Proton Mail vs FairEmail
Rating Summary
With 10 million+ downloads on Android and strong privacy credentials, Proton Mail serves security-conscious users globally. ProdApps gave Proton Mail a score of 7.65/10. Check out the full review here.
6. Email Blue Mail - Calendar
Blue Mail (marketed as "Email Blue Mail - Calendar") is a multi-account email app with 10 million+ downloads and a 4.1-star rating on Android across 799,000+ reviews, plus 4.4 stars on iOS. It promises unified inbox management with calendar integration and appeals to users who want to manage multiple email accounts from different providers in one interface. Recent reviews run lower, though: the last 100 average 3.85 on Android and 3.38 on iOS.
Reviewers say Blue Mail's multi-account support works as advertised, connecting Gmail, Yahoo, Outlook, iCloud, and custom IMAP/POP3 accounts. The unified inbox view consolidates messages effectively, and the built-in calendar helps coordinate schedules. However, recent reviews name the issues driving the dissatisfaction: crashes, freezes when opening a message, late notifications, and a top filter bar from the autumn redesign that can't be switched off.
Key Features:
- Unified Inbox & Folders – Manage unlimited email accounts (Gmail, Outlook, Yahoo, iCloud, Office 365) with combined folder views for Inbox, Sent, Drafts, and more
- People Toggle Switch – Innovative inbox view that reduces clutter by grouping conversations; tap avatars to see all emails between you and specific contacts
- Email Clusters – Automatically organizes similar emails from known senders into smart categories with sub-folder structure, removing inbox clutter without manual management
- Integrated Calendar – Access, create, and edit calendar events directly within the email app, eliminating the need to switch between applications
- BlueMail GEM AI – ChatGPT-powered assistance for writing emails, suggesting responses, and summarizing long message threads (premium feature)
- Smart Mobile Notifications – Customizable per-inbox with Quiet Hours, vibrate patterns, LED lights, snooze, and granular notification preferences
- Getting Stuff Done – Mark emails for later with reminders, mark as Done to clear your inbox, and work toward Zero Inbox productivity
- Direct Provider Connection – Its listing says it talks directly to your email provider without a proxy server
- Rich Text Signatures – Configure professional signatures with styling and logos, unlike plain-text-only competitors
- PGP Encryption – Sign and encrypt emails and attachments per account, importing your own key or creating one in the app; keys stay on your device
Pros & Cons
Pros:
- Completely free core features
- No ads in inbox
- Unlimited account support
- Integrated calendar included
- Desktop-like features on mobile
- Free PGP encryption
Cons:
- Forced filter bar after update
- Sluggish UI after updates
- Slow or resetting search
- Support unresponsive to emails
- Frequent crashes after updates
- Late or missing notifications
Who is this great for?
Blue Mail is suitable for users managing multiple email accounts who want unified inbox management with basic calendar integration. Whether you're juggling personal Gmail, work Exchange, and Yahoo accounts, Blue Mail consolidates them in one place. The people-centric inbox grouping helps organize conversations by contact rather than just chronologically.
It's potentially useful for users seeking a free, ad-free multi-account email app who can tolerate occasional crashes and slowdowns. If reliability is your priority, Microsoft Outlook has the steadier record, and FairEmail is where several recent switchers ended up.
Compared to others
Blue Mail offers similar multi-account management to Edison Mail and Microsoft Outlook, but both score higher here. While Blue Mail is free like Gmail, Gmail has stronger spam protection and a higher score. Compared to Thunderbird, Blue Mail has a more modern interface and stronger recent Android reviews.
Detailed comparisons
Blue Mail vs Edison Mail • Blue Mail vs Gmail • Blue Mail vs Outlook
Rating Summary
With 10 million+ downloads and 799,000+ reviews on Android, Blue Mail has a substantial user base despite recent complaints. ProdApps gave Email Blue Mail a score of 7.27/10. Check out the full review here.
7. Thunderbird: Free Your Inbox
Thunderbird arrived on Android in October 2024, bringing a desktop client with over 20 years of history to phones. With over 1 million downloads, a 3.6-star rating across 10,200+ reviews and 3.22 for the last 100, it hasn't matched that reputation on mobile yet. The slide has at least stopped: sentiment has held at about the same low level through versions 22 to 24.
Thunderbird for Android is a rebrand of K-9 Mail, a long-standing open-source email client, so it brought K-9's aging interface along with the Thunderbird name and Mozilla's resources. Recent reviews report sync delays, connection failures, and missing features, and notifications, search, and sync are the complaints that keep coming back.
Key Features:
- Unified Inbox – Manage multiple email accounts (Gmail, Outlook, Yahoo, iCloud, etc.) from one consolidated view with IMAP and POP3 support
- Privacy-Focused Architecture – Direct connection to your email provider with no data collection, tracking, or monetization of your personal information
- OpenPGP Email Encryption – Secure your messages with PGP/MIME encryption through integration with the OpenKeychain app
- Customizable Sync Options – Choose instant sync, scheduled intervals, or on-demand email checking to match your workflow preferences
- Desktop Configuration Import – Export your Thunderbird desktop settings and import them directly to mobile for seamless account migration
- Local and Server-Side Search – Find messages using both on-device and remote server search functionality
- Open-Source Foundation – Free, open-source code; its listing calls Thunderbird a trusted name in email for over 20 years
- Push Notifications for Non-Gmail – Notifications for email providers beyond Gmail, though reviewers report they can be unreliable
Pros & Cons
Pros:
- Completely free, no ads
- Open-source & privacy-focused
- Unified multi-account inbox
- Easy setup for most providers
- Mozilla Foundation backing
- Desktop config export/import
Cons:
- Unreliable push notifications
- Major sync delays reported
- Missing desktop features
- Poor search functionality
- Font size not adjustable
- K-9 Mail interface issues
Who is this great for?
Thunderbird is a fit for privacy-conscious users, open-source advocates, and anyone who already uses Thunderbird on the desktop. The approach is open standards, no tracking, and community-driven development, and the desktop config import makes moving over easy. If you can live with sync delays and missing features, it's worth trying.
If you need a reliable daily driver right now, consider FairEmail instead: it has the same open-source privacy approach with far stronger recent reviews. Microsoft Outlook and Gmail are the steadier mainstream options on Android.
Compared to others
Thunderbird shares its privacy approach with FairEmail and Proton Mail, but both score higher and have stronger recent Android reviews. Its recent Android reviews also sit well behind Gmail, Microsoft Outlook, and Edison Mail.
Detailed comparisons
Thunderbird vs FairEmail • Thunderbird vs Gmail • Thunderbird vs Proton Mail
Rating Summary
With 1 million+ downloads and a 3.6-star rating on Android, Thunderbird has Mozilla's backing and an open-source approach, but reviewers report persistent sync and search problems. ProdApps gave Thunderbird a score of 6.80/10. Check out the full review here.
8. Spark Mail: AI Email, Calendar
Spark Mail built its reputation on iOS, earning praise for its design and team collaboration features, and reached Android in April 2019 promising AI-powered email management and calendar integration. It has 1 million+ Android downloads, a 4.1-star rating there across 89,400+ reviews and 4.6 stars on iOS, but the last 100 reviews tell a different story: 2.75 on Android and 2.62 on iOS. The complaints that used to be Android's now come from both platforms.
Reviewers describe emails that take a minute or two to open and load attachments, AI features they can't switch off, a premium button that can't be hidden, and deleting or forwarding that behaves unpredictably. Recent iOS reviews add long-time users leaving over mail that won't load and constant AI promotion.
Key Features:
- Spark +AI Assistant – Summarize long threads, draft replies, rephrase messages, adjust tone, and translate emails (paid plans, with a limited free preview)
- Smart Inbox with Priority Sorting – Automatically pulls personal and high-priority emails to top, groups newsletters and notifications below for focused workflow
- Multi-Account Unified Inbox – Connect unlimited Gmail, AOL, Yahoo, Hotmail, IMAP, GMX, iCloud accounts in one mailbox without switching
- Spark Teams Collaboration – Shared inboxes, private email discussions, real-time collaborative email editor, secure email links, and team templates
- Integrated Calendar with Meeting Scheduling – View weekly plans, colleagues' calendars, built-in Google Meet and Zoom links for quick meeting setup
- Gatekeeper Sender Control – Pre-screen new senders, decide who can email you, block unwanted senders (premium feature)
- Email Scheduling & Inbox Controls – Schedule emails to send even if your device is off, mark mail as done, set it aside, or mute threads
- Smart Search & Integrations – Filter with Smart Search and Smart Folders, and connect Notion, Asana, Things, and 10+ other tools
Pros & Cons
Pros:
- Smart inbox prioritization
- Multi-account support
- Calendar integration
- Good search function
- Team collaboration features
- Clean design (when stable)
Cons:
- Sharp recent decline
- Slow or failed email loading
- AI features hard to switch off
- Block sender requires premium
- Expensive paid plans
- Unskippable premium prompts
Who is this great for?
Spark Mail could be great for teams needing collaboration features and users who value design, but its recent reviews are among the lowest in this comparison on both platforms. The complaint reviewers repeat most is mail that loads slowly or not at all.
If you need shared inboxes and team email, Spark might still work. For everyday mail, Gmail, Microsoft Outlook, and Edison Mail all have stronger recent reviews on Android.
Compared to others
Spark's iOS store rating (4.6) sits near those of Gmail and Microsoft Outlook, but its recent reviews don't. Canary Mail has reliability problems of its own and scores a little lower overall. Compared to Blue Mail or Thunderbird, Spark has weaker recent Android reviews.
Detailed comparisons
Spark Mail vs Gmail • Spark Mail vs Outlook • Spark Mail vs Edison Mail
Rating Summary
With 1 million+ downloads on Android and store ratings of 4.1 there and 4.6 on iOS, Spark's averages sit well above its recent reviews. ProdApps gave Spark Mail a score of 5.80/10. Check out the full review here.
9. Canary Mail - AI Email App
Canary Mail markets itself as an AI-powered premium email app with advanced features and security. With over 100,000 Android downloads, it holds a 4.2-star rating there across 7,710+ reviews (3.65 for the last 100) and 4.5 stars on iOS (3.12 for the last 100). Its paid plans cost $36 or $100 a year, both are also sold as one-time lifetime purchases, and Google Play lists in-app items up to $299.99.
Recent feedback points to a recovery that stalled at a low level rather than a fresh collapse. Reviewers report mail that's slow to load, deletes that spin and fail, notifications for messages that aren't in the inbox yet, and AI features paying users find disappointing. Crash reports have thinned out, but they haven't gone away. iOS has the calendar and more swipe options, but its recent reviews run lower than Android's.
Key Features:
- Conversational AI Email Assistant (Inbox Copilot) – Chat interface for email management, summaries of people/topics, priority email lists, and automated actions like unsubscribing (premium feature)
- AI-Powered Email Composition – Sentence recommendations, custom drafts with templates, and automated email generation for common responses (premium feature)
- Multi-Account Unified Inbox – Universal support for Gmail, iCloud, Office 365, and other providers with combined inbox view and cross-account contact management
- PGP Encryption – Built-in support for encrypting emails with PGP/MIME including certificate creation and management (Pro+ plan)
- Read Receipts – Get notified when recipients open your emails
- Smart Notifications – AI-filtered notifications for only the most important conversations
- True Dark Composer – Dark mode interface for composing emails without eye strain
- Email Templates – Save frequently used drafts for quick reuse in repeat scenarios
Pros & Cons
Pros:
- PGP encryption built-in
- Clean UI when stable
- Multi-account management
- Cross-platform availability
- Read receipts feature
- Lifetime license option
Cons:
- Recovery stalled at low level
- Mail fails to load or delete
- AI features disappoint users
- No Android calendar (iOS has it)
- AI button can't be removed
- Slow performance, reviewers report
Who is this great for?
Canary Mail is hard to recommend on current reviews, though some long-term users are happy with it, especially people running several IMAP accounts in one inbox. At $36 or $100 a year, or as a lifetime purchase, the reviews don't show the reliability a paid mail client should have.
If you want AI help with writing, Gmail's Smart Compose and Smart Reply are free. If you need encryption, Proton Mail and FairEmail include it for free, while Canary keeps PGP in its top plan. For a dependable all-round client, Microsoft Outlook and Edison Mail both have free tiers and stronger recent Android reviews.
Compared to others
Canary's pricing positions it against Microsoft Outlook and Gmail, both free for personal use, and both score well above it. Compared to Spark Mail, Canary has similar reliability complaints and a lower score, though its recent reviews are stronger. Thunderbird also struggles, but it's free.
Detailed comparisons
Canary Mail vs Gmail • Canary Mail vs Outlook • Canary Mail vs Proton Mail
Rating Summary
Canary Mail has 100,000+ Android downloads, a 4.2-star rating there and 4.5 stars on iOS, with recent reviews well below both. ProdApps gave Canary Mail a score of 5.42/10. Check out the full review here.
10. Yahoo Mail
Yahoo Mail launched on Android in 2010 as one of the earliest major email apps and now has 100 million+ downloads and 8.85 million reviews there. Its 4.2-star Android rating and 4.7 stars on iOS sit far above its recent reviews: the last 100 average 2.25 on Android and 2.26 on iOS.
Updates between August and October 2025 broke core functions for many reviewers, who report that folders such as spam, sent, and trash disappeared for months. One reviewer says Yahoo called the folder change an "experiment." Reviewers also report AI categories they can't turn off, move buttons that vanish, emails stuck in the outbox, and blank attachments. The pattern continued in 2026: recent sentiment has climbed a little from its August low, but October brought another new layout, and the October 21 update made folders hard to see again for some Android users.
Key Features:
- Multi-Account Unified Inbox – Connect Gmail, Outlook, AOL, Hotmail accounts to manage all emails in one app without switching between providers
- Gamified Inbox Cleanup ("Catch Up in Seconds") – Fast swipe-based keep-or-delete view for quickly sorting through unread emails
- Delete by Sender & One-Tap Unsubscribe – Instantly declutter inbox by eliminating all emails from specific senders or unsubscribing from newsletters
- Package Tracking & Receipt Organization – View order status at the top of inbox and track recent purchases in dedicated section
- AI Email Categorization – Automatic sorting into Primary, Offers, Newsletters, and Other, which reviewers say can't be turned off
- AI Summaries & Compose – Summarize long emails and draft replies with tone assist
- Planner – Surfaces events, tasks, and reservations from your email in one view, alongside your Gmail calendar
- Yahoo Mail Plus – Ad-free mail and 200 GB of storage for $5/month after a 14-day trial, according to Yahoo
Pros & Cons
Pros:
- Delete by sender works well
- Ad-free plan at $5/month
- Multi-account support
- Package tracking useful
- Good accessibility features
- Long-established service
Cons:
- Redesigns with no way back
- Folders vanish after updates
- Can't disable AI filtering
- Ads mixed in with mail
- Move button randomly missing
- Streaks, badges, and constant popups
Who is this great for?
Yahoo Mail is difficult to recommend on current reviews. If you have a Yahoo address, you can reach that mail through other apps: Gmail, Microsoft Outlook, and Edison Mail all support Yahoo accounts and have far stronger recent reviews on Android.
If you aren't tied to your Yahoo address, moving to Gmail, Outlook, or Proton Mail is worth considering. If you stay, Yahoo Mail Plus promises ad-free mail, though some subscribers in recent reviews say they still see ads.
Compared to others
Yahoo Mail once competed with Gmail and Microsoft Outlook, but it now has the lowest score in this comparison. Even apps with their own problems, like Thunderbird, Spark Mail, and Canary Mail, score higher. Blue Mail also connects Yahoo accounts and has stronger recent reviews on both platforms.
Detailed comparisons
Yahoo Mail vs Gmail • Yahoo Mail vs Outlook • Yahoo Mail vs Blue Mail
Rating Summary
With 100 million+ downloads on Android but recent reviews at 2.25 there and 2.26 on iOS, Yahoo Mail has the lowest score in this comparison. ProdApps gave Yahoo Mail a score of 3.83/10. Check out the full review here.
Final Thoughts
Looking at all 10 email apps side by side across iOS and Android, clear winners emerge, though recent reviews show quality problems even at major developers.
FairEmail (8.72/10) takes the top spot for users who value privacy, open-source transparency, and comprehensive email management. The $7.49 one-time payment, exceptional developer support, and unlimited customization make it the best choice for power users and privacy advocates. Edison Mail (8.53/10) follows, with speed and smart features, on firmer ground on Android than on iOS. Gmail and Microsoft Outlook are level at 8.33/10. Gmail delivers search and spam filtering for free, though its new iOS design is drawing complaints, and Outlook remains the best business-focused option for users invested in Microsoft's ecosystem.
Proton Mail (7.65/10) stands alone for users who need end-to-end encryption and zero-access security. If privacy is non-negotiable, Proton delivers despite recent reliability complaints and interface limitations. Further down, the problems get bigger: Blue Mail (7.27/10) has slipped since its autumn redesign, Thunderbird (6.80/10) still struggles with sync and search on Android, Spark Mail (5.80/10) draws complaints about slow mail loading on both platforms, Canary Mail (5.42/10) charges for an app reviewers call unreliable, and Yahoo Mail (3.83/10) has the lowest score, with reviewers reporting folder changes, ads in the message list, and new layouts they can't undo.
Our recommendation: Start with Gmail if you want reliable, free email, and check its new layout first if you're on iPhone. Choose FairEmail if privacy and customization matter most. Pick Outlook for Microsoft ecosystem integration. Select Proton Mail if encryption is required. Try Edison Mail if you want smart features and speed. The bottom three, Spark Mail, Canary Mail and Yahoo Mail, are hard to recommend until their recent reviews improve, because free alternatives with stronger reviews exist.
Check out the full comparison table to see all 10 email apps side-by-side and make the best choice for your needs. And if the problem is finding the address rather than reading the reply, there's a similar list of the best email finder tools for Chrome.
