Privacy Policy
Perepalka (Перепалка) is a game for learning foreign-language vocabulary: an app for iPhone and Android and a web version at app.perepalka.com. This page explains what data we collect, why, who receives it and how to delete it.
Account
The game creates an anonymous session on first launch, with no email, password or form to fill in. You can link an Apple or Google account at any time so that your progress survives a new phone or browser; when you do, we receive your email address from that provider.
What we store
Your game progress: rating, level, learned words and review queue. Your answers in battles together with the time each one took, which we need to measure how difficult each word is. Your device language, and a notification token if you allowed notifications.
What we do not collect
We show no advertising and use no advertising identifiers. We have no access to your location, contacts, microphone, camera or photos.
Analytics
In the app we count how it is used: how many battles are played, whether the mistake review is opened, whether people come back the next day. The words themselves and your answers are never sent to analytics. Analytics is currently off in the web version.
The web version and this site
The game in a browser keeps its session and a local database — cached questions and the review queue — in that browser's storage on your device. Clearing the site's data removes them, which is why linking an account is worth it when you play in a browser. Neither the game nor perepalka.com sets cookies or loads third-party analytics.
Who receives data
| Service | What it receives | Where |
|---|---|---|
| Supabase | account, email after linking, game data | Europe |
| Fly.io | requests to the game server, IP addresses in logs | Europe |
| Cloudflare | requests to this site and the web version, IP addresses in logs | global network |
| Google Firebase | notification token and text, app only | |
| PostHog | analytics events without words or answers, app only | Europe |
| Sentry | technical crash reports | — |
| Apple, Google | sign-in, if you linked an account | — |
We do not sell data or pass it to data brokers.
Deletion
Settings → Delete account. This erases your account and everything tied to it, including your email, and cannot be undone. Anonymous records of games that serve as opponents for other players contain nothing that points to you and remain. Logs with IP addresses are deleted under the retention rules of Fly.io and Cloudflare.
Children
Perepalka is not intended for children under 13.
Changes
When this policy changes, we update the date at the top of the page.
Contact
Questions about your data and deletion requests: support@perepalka.com.