Flashcards that stick.
RecallKit is a native iOS app built on FSRS‑5 — the modern spaced‑repetition algorithm that schedules each card from your actual recall. Seven curated language courses, or bring your own decks via CSV / TSV / .apkg.
Il est célibataire.
That's the whole loop. FSRS‑5 does the rest.
Real FSRS‑5 scheduling
A pure‑Swift implementation of the full 19‑parameter algorithm — and it re‑optimises from your own review history. Forgetting curves, not fixed intervals.
Bring your entire library
.apkg import preserves media, sub‑decks, and review history. CSV / TSV covers spreadsheets and exports from other study tools.
Seven curated courses
CEFR‑aligned French, Spanish, German, Italian; JLPT Japanese; TOPIK Korean — 11,000+ cards with audio, examples, and grammatical gender.
Local‑first, iCloud‑synced
Your decks and review history live on your device and in your private iCloud. Same Apple ID, same state on iPhone and iPad.
No account. No sign‑up. No tracking. There is nothing to sell — your study data never touches a third‑party server. The few anonymous product‑health signals we collect are bucketed, content‑free, and can be switched off in Settings.