Privacy Policy

The short version

Your books never leave your device. Folio only syncs your reading progress, streaks, stats, and the list of book titles so your account works across devices. The actual book files and their contents are never uploaded to our servers.

Who we are

Folio ("we", "us") is a reading app that turns your EPUB books into a gamified, level-by-level journey. This policy explains what we collect and why.

What we collect

• Account — when you sign in with Google, we receive your Google account ID, email, and display name (via Firebase Authentication) to create your account.
• Reading data — your progress, streaks, XP, daily goals, and book metadata (titles, authors, level counts, a content hash). This lets you pick up where you left off on any device.
• Purchases — subscription and purchase status from RevenueCat / Google Play, so we know whether your Folio Pro benefits are active. We never see your card details.
• Diagnostics — anonymous crash reports (via Firebase Crashlytics) to fix bugs.

What we never collect

• The book files you import, or their text/contents.
• Your payment card or bank details.
• Your contacts, photos, or location.

How we use it

Only to run the app: authenticate you, sync progress across devices, apply your purchases, and improve stability. We do not sell your data or use it for advertising.

Who processes your data

• Google Firebase — authentication and crash reporting.
• MongoDB Atlas — stores your progress, stats, and entitlements.
• RevenueCat & Google Play — process purchases and subscriptions.

Deleting your account

You can delete your account any time from Settings → Delete account. This permanently removes your account and all synced data (progress, stats, streaks, entitlements, and book metadata) from our servers. Books stored locally on your device are removed when you uninstall the app.

Data retention

We keep your synced data until you delete your account. Anonymous crash logs are retained by Firebase per Google's policies.

Children

Folio is not directed at children under 13, and we do not knowingly collect their data.

Changes

We may update this policy; the "last updated" date above will change. Significant changes will be surfaced in the app.

Contact

Questions or requests? Email bufferlabsstudio@gmail.com.