Authenticator by Matt Rubin
Authenticator by Matt Rubin: A focused offline OTP app for Apple users who do not need multi-device sync. Ranked #91 of 111 in Authenticator Apps by our editors (3.0/10); pricing: Free plan; best for minimal open-source Apple OTP app.
At a glance
- Editor score3.0 / 10
- PricingFree plan
- Best forMinimal open-source Apple OTP app
- Free planYes
- Paid fromFree
- Facts checked22 Sep 2026
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
Our verdict on Authenticator by Matt Rubin
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.
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Authenticator by Matt Rubin pricing
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Authenticator by Matt Rubin fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Code type | Totp and hotp |
| Push approvals | Not verified |
| Encrypted backup | Not verified |
| Multi-device sync | No |
| Team administration | Not verified |
| Supported platforms | ios, macos |
| Deployment | Mobile, Desktop |
| Platforms | iOS, macOS |
| Built for | Solo, Small business (editorial estimate) |
| Pricing | Free plan (source) |
| Website | mattrubin.me |
| Facts checked | 22 Sep 2026 |
Alternatives to Authenticator by Matt Rubin
- Proton AuthenticatorA mature free option for secure 2FA codes across mobile and desktop platforms.9.4
- Google AuthenticatorA free, straightforward authenticator with offline codes, sync, and QR transfers.9.2
- AuthyA focused free authenticator for mobile users who need synced TOTP tokens.9.1
See all Authenticator by Matt Rubin alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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