Secret Keeper — Encryption
Private messages & files
Free
Secret Keeper is a standalone end-to-end encryption tool. It turns any
communication channel into a secure one: encrypt a message or a file, send
the result over a regular messenger or e-mail, or show it as a QR code —
only the intended recipient can decrypt it.
NO SERVERS, NO ACCOUNTS
• The app is fully offline: no sign-up, no phone number, no e-mail.
• Keys are generated on your device and never leave it.
• We collect no data at all — there is simply nowhere to send it.
CRYPTOGRAPHY
• Modern standard algorithms: X25519 + AES-GCM.
• Your identity is a 12-word seed phrase: it restores your profile on a
new device.
• Your address is a short string / QR code that is safe to share openly.
• The envelope format is open and documented (secretkeeper.net).
ACCESS PROTECTION
• PIN code and biometrics (Face ID / Touch ID / fingerprint).
• Duress PIN: a separate code that opens an empty profile.
• Automatic wipe after several failed PIN attempts.
• Locks when the app goes to background; screenshot protection (can be
turned off).
MESSAGING AND FILES
• Offline chats: per-contact message history, stored encrypted.
• Encrypt files of any type (.skf) — photos, videos, documents.
• Backup is a single encrypted file (.skb): its contents can only be
opened with your seed phrase.
INTEGRATIONS
• Tetatet Chat: link the apps and secret messages get delivered online
automatically.
• The Secret Keeper browser extension encrypts right on websites.
• Passwordless sign-in to services via QR (SK Login).
WHO IT IS FOR
Anyone who values privacy: personal correspondence, passwords and codes,
documents, medical and financial data. Secret Keeper requires no trust in
a middleman — verifiable cryptography instead of promises.
Open protocol specification: https://secretkeeper.net/protocol
Privacy policy: https://secretkeeper.net/privacy
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
• One-time codes (TOTP): scan the QR from a site's two-factor setup or paste the otpauth link, and the code with its timer is right on the card.
• Passkeys: Secret Keeper can be your passkey provider on iOS 17+ and macOS 14+. Move a passkey to another device with a QR code; only Secret Keeper with the same seed phrase accepts it.
• Sign in with Secret Keeper on websites: the site identifies itself right in the QR code, with its own address and key, with no middleman between the app and the site. The same applies when a site requests data from the Vault.
• Test mode for data requests: on a demo site, or when the site asks for it, Vault values are sent partially masked, for example 41** **** **** **11, so real card details never reach a test environment.
• Vault: service logos next to logins, one-time codes and passkeys; Records, One-time codes and Passkeys switch with pills at the top.
The developer, PAYMASTER TECHNOLOGIES ELEKTRONIK PAZARLAMA DIS TICARET LIMITED SIRKETI, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- PAYMASTER TECHNOLOGIES ELEKTRONIK PAZARLAMA DIS TICARET LIMITED SIRKETI
- Size
- 46.6 MB
- Category
- Utilities
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 10.15 or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
18+
- 18+
- Copyright
- © 2026 SecretKeeper.net