Privacy Policy

Sirin is a music-composition app for cafés, studios, restaurants, salons and any business that wants original music for its space. This policy explains what we collect, why, and how to remove your data.

What we collect

• Account information. If you sign in with Apple, we receive a user identifier from Apple. Apple may also give us your name and email (you can choose to hide either). If you continue without signing in, we generate an anonymous device-bound identifier so your library survives reinstalls on the same device.
• Your brief. The text, mood preferences, language, and optional photos you provide while describing your space. Photos stay on your device — they are never uploaded.
• Songs you make. Audio files generated for you are stored on our servers so you can access them from the iOS app and the web library.
• Purchases. Apple lets us know when you buy a credit pack. We store the transaction identifier and the credits you received.
• Basic telemetry. App version and locale, so we can debug issues and prioritise translations.

What we do NOT do

• We do not sell or share your data with anyone.
• We do not run advertising in Sirin and we do not track you across other apps or websites.
• We do not analyse the content of your songs to train any model.

Third parties we use

• Apple. Sign in with Apple, App Store purchases, push notifications.
• OpenAI. Generates the pack plan and cover art. Receives the brief you submit but does not retain it for training.
• MiniMax. Generates the audio from each track's prompt. Receives the prompt but not your identity.
• Cloudflare / AWS. Hosts the audio files and database.

Your rights

You can wipe your local library at any time from Sirin → Player → long-press the wordmark → Erase everything. To delete your server-side library and account, email hello@stenofast.com from the address linked to your account. We delete within 7 days.

Children

Sirin is not directed at children under 13 and we do not knowingly collect data from them.

Changes

If we materially change this policy we will notify you in the app before the change takes effect.

Contact

Questions? hello@stenofast.com.