AnkiMobile Flashcards vs Sum
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AnkiMobile Flashcards
This flashcard app offers a powerful spaced repetition system for efficient learning and memorization. Sync your decks across all your devices, including desktop and web, for seamless study anywhere. Supports large collections, custom card creation, and detailed progress tracking.
- Spaced repetition scheduling (SM-2 and FSRS)
- Free sync with AnkiWeb across devices
- Support for large card collections (100,000+)
- Offline study with local media storage
- Flexible interface for efficient study
- Detailed progress graphs and statistics
- MathJax and LaTeX rendering
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Your decks, wherever you go! AnkiMobile is the official Anki app for iPhone and iPad, the flashcard app that more than 15 million learners worldwide have loved and trusted for over 20 years, made by the team behind Anki and AnkiWeb. Your purchase directly supports the open-source project that keeps Anki desktop free for everyone. Sync is included at no extra cost: no subscription, no sync fees. What you get: - Free sync with AnkiWeb. Keep your decks and study progress in sync across iPhone, iPad, Mac, Windows, Linux, and the web. Add cards on your computer, study them on your phone. - The same SM-2 and FSRS scheduling as desktop Anki, so you review material right as you're about to forget it. - A flexible interface designed for smooth and efficient study. - Detailed graphs and statistics about your progress. - Support for large collections, including 100,000+ cards. - Offline study. Media (images and audio) is stored on your device. - Powerful search for building filtered decks, e.g. "tagged high priority, answered in the last ten days, and not containing these words". - MathJax equations and LaTeX rendering. - Apple Pencil support for adding hand-drawn images to cards. Good to know: AnkiMobile works alongside the desktop version of Anki. Some tasks might require the desktop version, and add-ons are not supported on mobile yet. Sync is optional. You can also import and export data over USB or AirDrop. Buy once and use AnkiMobile on all your devices with the same Apple ID. Family Sharing is also supported. Educational institutions can find bulk discounts information through Apple's Volume Purchase Program. Need help? The manual and support resources are at https://docs.ankiweb.net/ankimobile/support. If you have questions or want to report an issue, contact us through our support site.
Sum
Track and manage your study time by subject with a simple timer. Log sessions, add notes, and visualize your progress with weekly graphs and a calendar. Focus on learning without distractions.
- Study time tracking
- Subject and material logging
- Weekly progress graphs
- Calendar visualization
- Study streaks
- Pomodoro timer
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This is a simple study timer app that allows you to record and manage your study time by subject. Simply measure your time with the timer and save it. You can also log sessions manually or add entries for past dates. You can record everything together, including subjects, study materials, pages, and notes. You can view the big picture of your studies by checking your subject balance with weekly graphs and reviewing your progress streaks on the calendar. No ads, no social media features, and no account registration required. All data is saved on your device, so there are no privacy concerns. Perfect for anyone who wants to focus on learning, from exam preparation to certifications and language studies. [Main Features] - 3 timer modes (Stopwatch, Countdown, Pomodoro) - Management of subjects, materials, pages, and notes - Weekly graphs to check subject balance (bar chart & donut chart) - Calendar to visualize study days with color-coding - Display of consecutive study days (streaks) - Daily study reminder - Backup and data export functions [Stackd Pro (One-time purchase)] - Monthly graphs and cumulative line graphs - Setting weekly goals and checking achievement rates - 9 color themes - Home screen and lock screen widgets - Real-time timer display on the Lock Screen
Screenshots
Verdict
The clearest difference is price: Sum at Free against AnkiMobile Flashcards's $24.99. Sum also leads on rating (5.0 vs 4.0) and review sentiment (100% vs 59%). AnkiMobile Flashcards's advantage is in-app purchases (none vs 1) and ratings volume (2.4K vs 2). On ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Sum is free to download; AnkiMobile Flashcards costs $24.99 up front. Sum sells 1 one-off in-app purchase. AnkiMobile Flashcards asks for nothing beyond the download.
Sum holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: AnkiMobile Flashcards has 2.4K ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 59% of AnkiMobile Flashcards's written reviews are positive against 100% of Sum's.
AnkiMobile Flashcards ships an update every 6 weeks, Sum every 3 weeks. Both last shipped on November 9, 2026.
| Parameter | AnkiMobile Flashcards | Sum |
|---|---|---|
| Price | $24.99 | Free — better |
| Rating | 4.0 (2.4K ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 58.5% of reviews | 100.0% of reviews — better |
| Number of ratings | 2.4K — better | 2 |
| Update frequency | Every 6 weeks | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Best chart rank | #1 — better | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.2 — better | 18 |
| Further details — not scored | ||
| Size | 38 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Anki Software, LLC | Nene Nakagawa |
Customer experience
AnkiMobile Flashcards
Sum
Bugs and requests
AnkiMobile Flashcards
Reported bugs
5 issues- Cards disappearing after updates
- Inconsistent behavior when switching between apps
- Inability to delete decks on mobile
- Sync issues causing data loss
- Compatibility problems with older iOS versions
Requested features
6 requests- Add dark mode option
- Improve card browsing and management features
- Integrate with Apple Pencil for better note-taking
- Add support for more file formats (e.g., Opus audio)
- Enhance mobile-specific features and UI
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- Provide better onboarding and tutorials
Sum
Not enough reviews yet to summarise bugs or requests.
In-app purchases
AnkiMobile Flashcards
No in-app purchases
Sum
- Stackd Pro$1.99
Questions
Is AnkiMobile Flashcards free?
Is Sum free?
Which has better reviews, AnkiMobile Flashcards or Sum?
Do AnkiMobile Flashcards or Sum have ads?
Which is updated more often, AnkiMobile Flashcards or Sum?
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