Arithmetic Trainer

Privacy

Short version: no tracking, no ads, nothing sold. Accounts are optional.

Without an account

Everything you play is saved in your browser’s local storage on your device. It never leaves it. Clearing this site’s data in your browser deletes it, so export a backup in Settings now and then.

With an account

If you sign in, we store:

The data is kept by Supabase, the database provider. The database only lets each account read and write its own rows. Nobody else can see your rounds.

We do not use cookies for tracking, analytics or ads. Your browser keeps a sign-in token in local storage so you stay signed in.

Deleting your data

Settings → Account → Delete my account removes your account and every round stored in it. Settings → Reset all data clears this browser.

Questions

Open an issue on the project’s GitHub repository.

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