We give a shit about your privacy.
Your taste is personal. We collect what we need to run your account, remember your choices, and make synff useful. We do not sell your personal data, and we do not give advertisers access to your listening profile.
Your email address, display name, profile preferences, sign-in history, and active sessions. Sessions include basic device information and an IP address so we can secure your account and investigate access problems.
The artists in your Rotation, records in your Crate, recommendation responses, saved Threads and Vibes, and your Fingerprint. When you are signed in, we may also record a small set of deliberate product actions, such as opening a catalogue record, starting a capture, or reviewing a Recommendation Drop, so we can understand whether the product is useful.
Anonymous, aggregate analytics on public web pages help us understand acquisition. Signed-in product measurement is stored separately in synff's database and tied to your account. Its event fields are fixed and do not accept email addresses, notes, search text, provider URLs, passwords, authentication tokens, or magic links.
When you choose a listening or buying link while signed in, we may record the provider, action, record, source surface, device platform, and whether the operating system accepted the launch. We do not store the provider URL in the new handoff ledger. A handoff does not tell us that music played, a purchase happened, or money moved.
Vercel helps us diagnose the website and server. Expo's EAS Observe measures native-app startup and release performance using an anonymous per-installation identifier, which we do not join to your synff account. Our own app diagnostic signals contain only fixed technical reason and destination values—not account identifiers, taste data, email, notes, search text, provider URLs, or query strings. The app SDK and Apple or Google store tools may also provide technical exception or crash diagnostics. These diagnostics are operational, not product measurement.
Saved Threads, Vibes, and Fingerprints stay private until you choose to share them. Sharing creates a public link that anyone with the URL can open. You can manage Fingerprint sharing in settings.
We use this information to secure your account, save the choices you make, shape recommendations and your Fingerprint, send the messages you ask for, and understand where the product needs work.
Your taste is not an advertising profile.
synff relies on service providers to host the app and database, store images, deliver email, measure product usage, and run parts of its recommendation and generation systems. They only receive the information needed to provide those services under their own data-protection terms.
When synff writes a Fingerprint reading, it sends the musical evidence needed for that reading through a zero-data-retention model request. Your email, password, and sign-in credentials are not part of that prompt.
Aggregate economics reporting keeps observed provider routes, listener confirmations, ownership evidence, and modelled rightsholder-revenue ranges separate. A modelled range is not an observed payment, and we do not collect purchase amounts or infer how a rightsholder receipt is divided among labels, publishers, songwriters, performers, or other parties.
You can access and update your profile information at any time through your account settings.
You can request a copy of your data by emailing hello@synff.co.
You can delete your account from account settings. This removes the account's listener data and files from synff's active systems, and we cannot recover the account afterwards. Service providers may retain limited backups or security logs for their own documented retention periods or legal obligations.
Questions about your data? Contact us at hello@synff.co.
Last updated August 2026
