Flashcards
Study with cards that come back exactly when you are about to forget them — in a deck you own outright, offline.
No signup, no install, nothing to cancel.
This is the real app, running on sample data — click around. Nothing here is saved, so open it in the full Web Preview when you want to keep what you make.
Why everyday users pick Capsule
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One portable file
The app, your data, and everything it needs live in a single .capsule file you can move, copy, or back up like a photo.
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100% private
No accounts, no cloud, no tracking, no ads. Nothing you write leaves your device unless you send the file yourself.
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Shareable anywhere
Send it over AirDrop, WhatsApp, or email. Whoever gets it can open it in a browser — no install, no signup.
What makes this Flashcards worth using
Proven spaced repetition
Reviews are scheduled by the SuperMemo SM-2 algorithm, so easy cards get out of your way and shaky ones come back sooner.
Flip, hint, and recall
Tap or press space to flip. Hints are there for the cards you nearly know, which is where the learning happens.
AI deck generator
Type a topic — "French travel phrases", "cell biology" — and get a starting deck you can edit, instead of a blank screen.
Study anywhere
On a laptop, or in a browser on the train with no signal. Your progress stays in the file, not on someone’s server.
How it works
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Open it
Try it in your browser right here, or get the desktop app for macOS, Windows, or Linux.
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Make it yours
Add your own content. Everything saves into one file on your own device as you go.
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Keep or share it
Store the file wherever you like, back it up by copying it, or send it to someone the way you would send a document.
Frequently asked questions
What is spaced repetition, in plain terms?
Cards you find easy reappear after longer and longer gaps; cards you stumble on come back quickly. You spend your time on what you have not learned yet.
Can I share a deck with my class?
Yes — send the file. Everyone who opens it gets the same cards, and each copy then tracks its own review schedule.
Do I need to create an account?
No. There are no accounts, no passwords, and no signups. Open the template and start using it.
Where is my data saved?
On your own device, inside a single .capsule file you choose the location of — the same way a photo or a spreadsheet is saved. Nothing is uploaded.
Can my friends open the file if they don't have the app?
Yes. Send them the file and they can open it in the free Capsule Web Preview in any browser, with no install and no account.
Does it cost anything?
No. Capsule and every template are free, with no subscription, no ads, and no paid tier holding features back.
Does it work offline?
Always. The app, its data, and its interface all live in the one file, so nothing needs a connection — on a plane, in a basement, or with your Wi-Fi off.
Explore the other templates
Start with Study Deck.capsule
Open it in your browser now, or install Capsule to keep files on your own machine and share them like any other document.