Authenticator by Matt Rubin review
A focused offline OTP app for Apple users who do not need multi-device sync.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Authenticator by Matt Rubin is a free, open-source two-factor authentication app for Apple devices. It generates time-based and counter-based one-time passwords, supporting both TOTP and HOTP. Accounts can be added by scanning QR codes, opening otpauth URLs, or entering token details manually. That makes it suitable for Apple users who want a focused authenticator without a paid tier or a broader account-management platform.
The app’s strongest fit is privacy-conscious offline use. It stores data in the encrypted iOS Keychain, keeps secret keys on-device, and states that it does not connect to the internet or transmit those keys. Token search and filtering help organize accounts, while the single Free plan includes the core OTP-generation and setup features. The published plan structure is straightforward: there is no paid upgrade separating basic account setup from more advanced functions.
Platform coverage is the main boundary. Authenticator is distributed through the Apple App Store and supports iOS and macOS, but it does not provide multi-device synchronization. Users who need their tokens synchronized across devices or who work outside Apple platforms should choose an authenticator with broader platform coverage and sync support. The listed version history also shows version 2.1.2 as the latest release, from 2019, which may matter to buyers evaluating how recently the app has been updated. Choose it for a minimal, open-source Apple OTP app with offline operation; look elsewhere for cross-platform access or synchronized credentials.
Authenticator by Matt Rubin pros and cons
- Where it wins
- Free and open source
- Supports both TOTP and HOTP codes
- Offline storage with encrypted iOS Keychain protection
- Where it doesn't
- Available only on iOS and macOS
- No multi-device synchronization
- Latest listed release is version 2.1.2 from 2019
Authenticator by Matt Rubin fact sheet, pricing and score →
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