Privacy Policy

Effective date: March 27, 2026

Who we are

Reef is a scuba diving logbook app developed by Anton Usov (individual developer, Austria). We are committed to protecting your privacy and being transparent about what data we collect.

Contact: support@reeflogbook.app

What data we collect

Authentication

You can use Reef anonymously (guest account) or create an account using email/password, Apple Sign In, or Google Sign In. Authentication is handled by Supabase Auth. We store only the minimum information needed to authenticate you (email address, auth provider ID).

Dive data

Your dives, gear items, certifications, dive sites, and settings are stored in a Supabase Postgres database and synced to your device via PowerSync (offline-first SQLite). Your data is private and only accessible to you.

Photos

Dive photos are stored locally on your device first. If you have an account, photos are backed up to Supabase Storage (cloud). Photos are private — they are not shared with other users or made public.

Location

Reef only accesses your location when you explicitly choose to add a dive site location. We do not track your location in the background.

Crash reporting

We use Sentry for crash reporting and performance monitoring. Sentry receives anonymous device information and stack traces — no personal data, no dive data, no photos. Crash reporting is disabled in development builds.

Purchases

Subscription purchases are processed by RevenueCat through Apple's App Store and Google Play. We never see or store your payment information (credit card, billing address). RevenueCat receives a pseudonymous user ID to manage your subscription status.

What we do NOT do

  • We do not sell your data to anyone.
  • We do not use advertising or ad trackers.
  • We do not use third-party analytics (no Google Analytics, no Facebook Pixel).
  • We do not share your data with third parties except the service providers listed above (Supabase, PowerSync, Sentry, RevenueCat), which are strictly necessary to operate the app.

Data storage and security

Your data is stored in Supabase (hosted on AWS in the EU). All communication between the app and our servers is encrypted via TLS. Database access is protected by Row Level Security (RLS) — each user can only access their own data.

Your rights

You have the right to:

  • Export your data — available in Settings > Sync & Data > Export. Downloads all your data as JSON.
  • Delete your account — available in Settings > About > Delete Account. This permanently removes your account and all associated data from our servers.
  • Contact us — for any privacy-related requests, email support@reeflogbook.app.

Children's privacy

Reef is not directed at children under 16. We do not knowingly collect personal information from children. If you believe a child has provided us data, please contact us and we will delete it.

Changes to this policy

We may update this Privacy Policy from time to time. Changes will be posted on this page with an updated effective date. For significant changes, we will notify users within the app.

Contact

Anton Usov
Email: support@reeflogbook.app
Website: reeflogbook.app