Update
Bring Your Anki Decks to Sona
Import an Anki deck package (.apkg) and Sona turns it into decks, images and audio included. It's on the web now, and the iOS and Android apps get it with their next update.
Blog
Product updates and practical ways to study with Sona.
Update
A Daily Study Reminder
Turn on a daily reminder in Settings and Sona nudges you at the time you pick. It's on the web now, and the iOS and Android apps get the in-app setting with their next update.
Update
A Visual Formula Editor
Write math on your cards without knowing LaTeX — the ∑ button in the card editor now opens a visual editor, on the web today and in the iOS and Android apps with their next update.
Update
Sona in French and Spanish
The web app and the iOS and Android apps now speak French and Spanish — picked up from your device, and shared across your account.
Update
Sona in German and Brazilian Portuguese
The web app and the iOS and Android apps now speak German and Brazilian Portuguese — picked up from your device, and shared across your account.
Update
Sona in Japanese and Korean
The web app and the iOS and Android apps now speak Japanese and Korean — picked up from your device, and shared across your account.
Update
Sona for iOS
The iPhone app is live on the App Store — the same account, Sign in with Apple, and Pro that follows you across web, Android, and iOS.
Update
Sona for Android
The Android app is live on Google Play — the same account, your decks downloaded for offline study, and answers that sync when you're back.
Guide
When Your Review Queue Gets Out of Hand
You skipped a few days and came back to a number that looks like a verdict. What that queue actually means, and a small way back in today.
Guide
Studying with Spaced Repetition
What FSRS actually does, how to rate a card honestly, and why a few minutes a day beats a weekend of cramming.
Guide
How to Create a Useful Deck
FSRS only works as well as the cards you feed it. A practical guide to writing cards, splitting decks, and using AI generation as a first draft.
Update
Introducing Sona
Simple to use, powerful underneath — FSRS-driven spaced repetition that tells you exactly what to review, and when.