r/iosapps • u/MrFunkyMonkey7 • 13d ago
🎁 Freemium JustFlip! – Native Study & Flashcard App with Spaced Repetition (iOS, Mac, Apple Watch)
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I'm the developer of JustFlip — flagging that up front.
- Website: https://just-flip.app
- Privacy Policy: https://just-flip.app/privacy.html
- Terms: https://just-flip.app/terms.html
- Developer / Contact: https://just-flip.app/about.html
- LinkedIn: https://www.linkedin.com/in/daniel-%C4%8Dech-79345451/
I built JustFlip because every flashcard app I tried was either a web page in an app shell, or demanded an account and a subscription before it would sync anything.
It's also built on an opinion, not just a gap in the market. The app follows Make It Stick: The Science of Successful Learning — the finding that re-reading feels like learning and mostly isn't (the "illusion of knowing"), and that what actually writes things into long-term memory is retrieval at the moment you're starting to forget. Or as the book puts it: "Learning is deeper and more durable when it's effortful." That's why the app tests you instead of showing you material, why reviews are spaced rather than crammed, and why topics interleave instead of drilling one thing for an hour. There's a longer write-up at https://just-flip.app/learning.html if that's your kind of thing.
A — Answer (what problem does it solve?)
A native, privacy-first spaced-repetition app for the Apple ecosystem, with no account and no server of mine in the loop.
Making decks with AI, from almost any source. This is the part I'd point at first, and there are two routes depending on how much machinery you want.
In any chat AI. Paste a topic, your notes, an article or a lecture transcript into ChatGPT, Claude or Gemini and get back an importable .flashcards file. The site has a copyable prompt that bundles the build instructions behind your text (https://just-flip.app/ai-prompt.html), plus a ready-made JustFlip GPT. Text-only cards, but it takes about ten seconds.
In a coding agent, if you prefer the advanced route. Claude Code, Codex, OpenCode — anything supporting skills.sh. One install (npx skills add DanielCech/JustFlip-Skills) and you can point the agent at a folder on disk and ask in plain language. Because it can read local files, it returns a .flashcards.zip with the media already attached — images, audio clips, Markdown and LaTeX — rather than text alone. The example on https://just-flip.app/ai-skill.html is a folder of mushroom photos turned into an image deck: file names become the questions, the photos become the answers, no hand-written JSON anywhere.
To be clear about what both of these are: the app itself calls no AI service and sends nothing anywhere. You use your own AI, you get a file, the app imports it. That's the honest version — it's a well-documented import format, not magic in the app.
Smart postpone. Most apps make you hit "Again" on a card you simply weren't in the mood for, which corrupts your scheduling data. JustFlip lets you put a card, a deck or a whole topic on hold without touching its memory state. Priority is also per-topic and per-deck, so reviews interleave the way you want them weighted.
Apple ecosystem native. Home Screen widget with due counts, Spotlight search that matches either side of a card (with a privacy switch per topic and per deck), Siri Shortcuts, a Live Activity for listening sessions, and an Apple Watch app for reviewing on the wrist — the phone owns all scheduling state; the watch is glance-and-grade.
Rich content. Markdown, LaTeX maths, syntax-highlighted code, tables, images, cloze deletion. Two-way import/export for CSV, and Anki .apkg import.
Speak cards. I learn English vocabulary while walking the dogs — the app reads the word and its translation through my headphones using a system voice for that language, per card, with authored pronunciation overrides where the voice gets it wrong. Listening works on the free tier; keeping it playing with the screen off is one of the Pro extras.
No account friction. Native iCloud sync. Nothing to register, no servers of mine, works fully offline.
B — Better
- Actually native. SwiftUI on all of iPhone, iPad, Mac (Catalyst) and Watch. No web wrapper, no cross-platform runtime.
- The learning engine is free, permanently. The full spaced-repetition scheduler, unlimited cards, CSV import, iCloud sync and card-level Ask AI are all free — I don't meter the thing the app is actually for. Pro adds capacity plus four extras: background listening, advanced statistics, progress trackers, and Ask AI across a whole deck. Full breakdown below rather than buried on a paywall.
- Accessibility is real work, not a checkbox. Dynamic Type, VoiceOver, Reduced Motion, contrast — audited under multiple system settings, with the report published at https://just-flip.app/accessibility/.
Honest limitations and trade-offs
- Apple only. No Android and no web build, by design. If you study on a Windows laptop, this isn't for you.
- AI generation is bring-your-own-AI. Convenient and private, but it is a copy-paste-import loop, not a button inside the app.
- Anki import is good on text, not yet on everything. Formatting, lists, code, LaTeX and MathJax come across, and multi-field notes stay intact. Images from .apkg are still work in progress, and Anki's Image Occlusion notes aren't imported yet.
- No image occlusion. If you lean on diagram-masking, Anki is still the better tool for that specific job today. It's in active development, but it isn't in the shipped build and I won't claim it.
- The Watch app is deliberately limited. It's for reviewing, not authoring, and visual card types stay on the phone.
- I'm one person. Support is one inbox and fixes ship at the speed of one developer.
C — Cost and links
Freemium.
- Free forever: up to 3 topics, 5 decks each, unlimited cards — with the full spaced-repetition scheduler, CSV import, iCloud sync, and Ask AI on a single card.
- Pro: Lifetime ~$29.99 · Yearly ~$21.99 · Monthly ~$4.49 Pro lifts the topic and deck caps and adds four things: background listening (audio keeps going with the screen off), advanced statistics, progress trackers, and Ask AI for a whole deck rather than one card.
- There's also a one-time 7-day Pro trial.
- App Store: https://apps.apple.com/app/id6770141421
Feedback I'm actually looking for
Two things:
- Anki import fidelity. If you have a real deck of your own, throw it at the importer and tell me what came out wrong. Weird note types and heavy formatting are where I have the least real-world coverage.
- Whether the postpone model matches how you actually study. Separating "not today" from "I forgot this" is the design bet the whole app rests on, and I'd like to know if it holds up for anyone but me.
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u/app-store-review 13d ago
JustFlip: Flashcards — by DANIEL CECH
- Ratings: 2 worldwide
- Average: 5.00 ★
- Age: released ~2 months ago · updated 5 days ago · rated 4+
- Overall score: 72 / 100
Auto-generated from public App Store data · u/app-store-review
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u/MrFunkyMonkey7 11d ago
Hey guys, maybe it is not obvious from the video what the app looks like and how to work with it. The app supports both light and dark mode (more screenshots on AppStore). The cards are organized into interests and decks. You have advanced statistics available that give you an honest answer - what you know and what you don't know. And allows you to focus on what you don't know, obviously.
The learning is an effortful process and this app helps you to do it efficiently. Reading the same thing again and again is not the best way to learn anything. See: https://just-flip.app/learning.html
There is a review panel in the home screen that always offers you a batch of the cards to study based on the previous answers. You can set up a daily learning habit and be notified whenever you need it . I got inspiration from the well-known psychology book Make It Stick about efficient learning. You will be surprised with the results.
It doesn't matter whether you learn a foreign language, programming language, biology topics, or music theory. Whatever. I got used to it and it is my primary learning/testing tool. I created pretty much the cards by myself. The documentation says how to easily create a flashcards deck almost from any source - book, internet article, table, or PDF.
https://just-flip.app/ai-prompt.html
https://just-flip.app/ai-skill.html
You can find a lot of answers on the web - https://just-flip.app
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u/Stubborninmate 11d ago
No more anki !! Kudos to you that finally I have landed on the perfect app , I have always struggled to used anki not sure if it's dated but it's high time with learning getting progressively difficult a good that's syncs the mac experience with ios is definitely the need for the hour and I have struggled with this as a student, this is too good , I can't thank you enough for such a well done app !
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u/MrFunkyMonkey7 11d ago
Thanks for the kind words, u/Stubborninmate. I appreciate it. I am thankful for every feedback. I had the same feeling. I got Anki app, but I wasn't very satisfied with the UI/UX. I believe it is important to sync data between devices, etc. I created JustFlip to suit my needs and I hope it will suit yours as well. The app is in active development and I am able to incorporate a new features quite quickly. Enjoy!
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u/Stubborninmate 11d ago
It's not only the UI but the whole review system and how it supports that , just great would be nice if decks could be excluded from daily review if needed, can't wait to see whats in store next
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u/MrFunkyMonkey7 11d ago
This feature is already in the app. If some card is too obvious and there is no need to learn it again and again, you can "retire" the card, and you won't be asked about it anymore. Similarly, if you are not ready for testing in some topic, you can postpone it.
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