FlashStacksThe best flashcard apps for iPhone in 2026
We build one of these apps, so read this with that in mind — but here's a genuinely honest breakdown of which flashcard app fits which kind of studying, including where ours isn't the right pick.
Last updated: June 2026
1. FlashStacks — best for studying without opening an app
Free + Premium · iOS
FlashStacks' whole thesis is that the best study session is the one you don't have to start. Cards live as Home Screen and Lock Screen widgets that rotate through the day — tap to reveal, tap to advance. Spaced repetition runs underneath, and Premium adds AI deck generation from PDF and image occlusion for diagrams.
Pick it if: you check your phone constantly and want that habit working for you; you'd rather upload lecture slides than write cards by hand.
Skip it if: you need desktop review or Android — it's iPhone-first.
2. Anki — best for power users and med students
US$24.99 on iOS (free on desktop) · All platforms
The 20-year veteran and still the deepest spaced-repetition tool ever built. Every scheduling parameter is tunable, the add-on ecosystem is enormous, and the shared deck library (especially for medicine) is unbeatable. The trade-off is a dated interface and a real learning curve. See our full FlashStacks vs Anki comparison.
Pick it if: you live in pre-made mega-decks or need total control.
Skip it if: you want something that works beautifully in five minutes.
3. Quizlet — best for pre-made decks and classrooms
Free + Plus (~US$36/yr) · All platforms
The biggest library of user-made study sets on the internet, plus games and classroom modes teachers love. Over the years more features have moved behind the paywall, and serious spaced repetition isn't its focus — it's built for cramming a unit test, not building long-term retention. See our Quizlet alternative comparison.
Pick it if: someone has already made the exact deck you need.
Skip it if: you want rigorous long-term scheduling.
4. Brainscape — best for confidence-based repetition
Free + Pro (~US$96/yr) · iOS, Android, web
Brainscape's twist is rating your confidence on each card from 1–5, which drives its scheduling. Solid content library and a clean web experience, but it's one of the pricier subscriptions in the category.
Pick it if: the confidence-rating loop clicks with you.
Skip it if: the price outweighs the polish for your use case.
5. Mochi — best for markdown note-takers
Free + Pro (~US$5/mo) · Mac, Windows, iOS, web
Cards written in markdown with backlinks — if your life is in Obsidian or Notion, Mochi will feel like home. The iOS app is more companion than flagship, and there are no widgets.
Pick it if: your notes are already markdown.
Skip it if: you're mobile-first.
Which one should you actually get?
| You are… | Get |
|---|---|
| A phone-checker who never "finds time" to study | FlashStacks |
| A med student inheriting a 20k-card deck | Anki |
| Cramming a unit test with a deck someone already made | Quizlet |
| Someone who thinks in confidence levels | Brainscape |
| A markdown/Obsidian person | Mochi |
| Drowning in lecture PDFs with no cards made yet | FlashStacks |
Studying that starts itself
Flashcards on your Home Screen, decks generated from your PDFs. Free to try.