Last updated: April 2026 · App: Attomus Signet · Developer: Attomus Ltd
Summary
Attomus Signet collects no data. It transmits no data. It requires no account. Everything the app stores stays on your device, under your control.
What we collect
Nothing.
Attomus Signet does not collect, transmit, store, or share any personal data, usage data, analytics, diagnostic information, crash reports, or device identifiers. The app makes zero network requests during normal operation.
Your authentication secrets
Your TOTP and HOTP secrets are stored exclusively on your device, protected by your device’s hardware security — the iOS Secure Enclave and Keychain on iOS, and Android Keystore on Android. They are never transmitted to Attomus or any third party.
Access to your secrets requires biometric or device credential authentication. Attomus has no ability to access, recover, or reset your secrets.
Backup files
If you choose to export a backup, the backup file is encrypted on your device using Argon2id key derivation and AES-256-GCM encryption before it leaves the app. The passphrase is set by you. Attomus does not hold a copy of your passphrase or your backup.
Where you store your backup file is entirely your choice — the app uses your device’s standard file sharing mechanism and does not transmit the file to any server.
Third parties
Attomus Signet contains no third-party analytics SDKs, advertising SDKs, crash reporting services, or social media integrations.
Children
Attomus Signet is rated 4+ and is suitable for all ages. The app does not collect data from any user, including children.
Changes to this policy
If this policy changes materially, we will update the date above. Because the app makes no network requests, you will not receive an in-app notification — check this page periodically if you wish to stay informed.
Contact
Questions about this privacy policy or the app’s data practices: hello@attomus.com