Privacy Policy

Last updated: 12 June 2026

Tail Twin is designed to be private by default. There are no accounts, no advertising, no tracking, and no sale of data — ever. This page explains exactly what data the app touches and where it goes.

Data that stays on your device

Almost everything. Your dog's profile and onboarding answers, care history, daily goals, streaks, memories, scrapbook entries, adventures, and reminder preferences are stored only in the app's local storage on your phone. They are never uploaded to us. Deleting the app (or using Settings → Start over) removes this data.

Dog photos and avatar creation

• When you create your Tail Twin avatar, you choose a few photos of your dog and give explicit in-app consent before anything is sent.
• The selected photos are transmitted over an encrypted connection (HTTPS) to the Tail Twin avatar server, which forwards them to OpenAI's image API to generate the stylized avatar.
• Your photos are not stored on Tail Twin's server — they are used for the generation request and discarded. OpenAI may retain API inputs briefly for abuse monitoring under its API data usage policy.
• The generated avatar images (the cartoon, not your photos) are stored on Tail Twin's server so the app can display them. To request deletion of your generated avatar images, email us at the address below and we will remove them.
• Photos are of dogs, but they can incidentally include people or surroundings — we recommend choosing photos that show just your dog.

Crash reports

If the app crashes, an anonymous crash report (the technical error, app version, device model, and OS version) is sent to Sentry, our crash-reporting service, so we can find and fix the bug. Crash reports contain no names, photos, answers, or anything from your dog's profile, and are not linked to your identity.

Analytics

The app contains no third-party analytics or advertising SDKs. Its internal event log is sanitized to exclude names, free-text answers, photos, and identifiers, and is not transmitted off your device.

Notifications

Daily reminders and gentle nudges are scheduled locally on your device. We do not operate a push notification server and cannot send you messages remotely.

Children

Tail Twin is rated 4+ and collects no personal information from anyone, including children.

Changes

If this policy changes, the updated version will be posted at this address with a new "last updated" date.

Contact

Questions or deletion requests: support@tailtwin.app