Question 1

Is repeat.cards free?

Accepted Answer

Today, the core is free: unlimited decks and cards, FSRS spaced repetition, statistics, deck import, audio playback. No card limits. AI features (mnemonics, audio, example sentences, images) work today through your own OpenAI or Google AI key — you pay the model provider directly. A paid plan that includes AI without any setup is in the works.

Question 2

What is FSRS, and why does it matter?

Accepted Answer

FSRS (Free Spaced Repetition Scheduler) is an open-source algorithm that predicts the moment you are about to forget a flashcard and schedules the review for exactly that point. Compared to older spaced-repetition algorithms it needs roughly 20% fewer reviews for the same retention rate, based on published efficiency studies. In repeat.cards, FSRS runs by default and tracks the front and back of every card independently.

Question 3

How does spaced repetition help me remember vocabulary?

Accepted Answer

Every time you successfully recall a word, the time until you would forget it grows. Spaced repetition exploits that: it shows you each card just before you would forget it, so you spend less time on words you already know and more on the ones in danger. Across thousands of cards, that is the difference between an hour a day of drilling and 10 to 15 focused minutes.

Question 4

Can I import an existing flashcard deck?

Accepted Answer

Yes. Drop in an Anki .apkg file and you will get a preview where you can map fields to repeat.cards fields, then create a new deck or merge into an existing one. Audio and images come along. Review history does not transfer — cards start in the 'new' state, but FSRS adapts within a few sessions.

Question 5

Which languages does repeat.cards support?

Accepted Answer

More than 100 languages. Where pronunciation differs by region, you can pick the variant you actually want — American or British English, Spanish from Spain or Mexico, European or Brazilian Portuguese, French from France or Quebec, Simplified or Traditional Chinese, and so on.

Question 6

Do I need an OpenAI or Google API key?

Accepted Answer

Not for spaced-repetition study — that is free without any key. You only need a key today if you want to use the AI features (mnemonics, audio, example sentences, images). You plug it in once in your account settings and pay the model provider directly. A paid plan that includes AI without any key setup is in the works for users who would rather not deal with API keys.

Question 7

Can I use repeat.cards on my phone?

Accepted Answer

Yes. The web app is responsive and works in any modern mobile browser — Safari on iOS, Chrome on Android. You can add it to your home screen for one-tap access. Native mobile apps are in the works; we will announce them when they are ready.

Question 8

Who is repeat.cards for?

Accepted Answer

Self-directed adult language learners — typically B1 and beyond — who already know what they want to learn and need a tool to remember it. We are not a course; we don't teach grammar. We are the tool you use to make the words you've collected stick.