Privacy policy

Last updated 27 October 2026

Your journal is personal, so we collect as little as we can and protect what we keep. This policy explains what the Three Lines A Day app stores, why, and the choices you have.

Your journal entries

The text of your entries is encrypted on your device before it is synced, using a key derived from your personal recovery key. Only you hold that key, so we cannot read your entries. If you lose both your recovery key and your device, your entries cannot be recovered, not even by us.

Some details are stored without that encryption so the app can work: the date of each entry, your mood rating, and timestamps. Photos you attach are stored in private storage that only your account can access, but they are not end-to-end encrypted.

What we collect

• Account details: your email address, or the identifier provided by Sign in with Apple or Google, used to sign you in.
• Journal data: encrypted entry text, dates, mood ratings and photos, so your journal syncs across your devices.
• Preferences: settings such as your theme and reminder time.
• Usage analytics: which screens and features are used and app errors, linked to an anonymous account ID. Never the content of your entries.
• Purchases: your subscription status. Payments are handled by Apple or Google; we never see your card details.

Who helps us run the app

• Supabase: account sign-in, database and photo storage.
• RevenueCat: managing subscriptions.
• PostHog: product analytics and error reports.
• Apple and Google: sign-in and payments.

We do not sell your data or use it for advertising.

On your device only

Face ID, Touch ID or fingerprint checks and daily reminders happen entirely on your device. We never receive your biometric data.

Deleting your data

You can delete your account at any time in the app under Settings → Advanced → Delete account. This permanently removes your entries, photos and account. See how to delete your account for other options.

Children

Three Lines A Day is not directed at children under 13, and we do not knowingly collect their data.

Changes and contact

If this policy changes, we will update the date above. Questions? Write to us at hello@threelinesaday.com.