Flippi Privacy Policy

Piraeus Technology · Effective June 10, 2026

Flippi is a flashcard app for spaced-repetition study. This policy describes what data the app handles and how. The short version: your flashcards belong to you, we collect the minimum needed to run the app, we show no ads, and we never sell your data.

Data we collect

• Account information. If you create an account, we store the email address you sign in with (via sign-in link, Google, or Apple). Sign in with Apple may provide a private relay address instead of your real one — that's fine with us.
• Guest accounts. You can use Flippi without creating an account. In that case the app creates an anonymous account identifier with no personal information attached. Guest data is tied to your device until you create an account; if you delete the app first, that data is gone.
• Your content. The decks, cards, and review history you create. This content is private to your account and is never visible to other users.
• Crash reports. If crash reporting is enabled in a release, we receive technical reports (device model, OS version, stack traces) when the app crashes. Crash reports do not include your flashcard content.

What we don't do

• No advertising, and no advertising identifiers.
• No selling or sharing of your data with third parties for their purposes.
• No analytics or behavioral tracking beyond the crash reporting above.
• No marketing email. We only email you sign-in links you request and messages about your account.

Where your data is processed

Flippi is built on Google Firebase: Firebase Authentication (sign-in), Cloud Firestore (your decks, cards, and review history), and Firebase Hosting (this site and the sign-in link page). Crash reports, when enabled, are processed by Sentry. These providers store data on our behalf and under our instructions.

Retention and deletion

Your data is kept until you delete it. Deleting a deck or card removes it permanently. Deleting your account (in the app: Settings → Delete account) permanently removes your account, decks, cards, and review history. See Delete your account for details and for how to request deletion if you can no longer access the app. Anonymized crash reports may persist for up to 90 days under our provider's retention policy.

Children

Flippi is not directed at children under 13, and we do not knowingly collect personal information from them.

Changes

If this policy changes, we will update this page and its effective date.

Contact

Piraeus Technology · piraeustechnology@gmail.com