Google Authenticator review
A free, straightforward authenticator with offline codes, sync, and QR transfers.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Google Authenticator is a free mobile app for generating one-time verification codes for websites and apps that support authenticator-based two-step verification. It supports time-based and counter-based codes, works offline, and is available on Android, iPhone, and iPad. The app suits individuals who want a focused authenticator rather than a broader identity or account-management tool. Multiple accounts can be stored, searched, and organized in the app.
The Free plan includes code generation, synchronization across devices, and QR-code account transfer. Synchronization lets users access authenticator codes across devices, while manual QR transfers provide another way to move accounts between devices. Codes are encrypted in transit and at rest. Account setup can be completed with QR codes, which fits services that provide authenticator-based two-step verification during security setup. The app also includes Privacy Screen, which uses device authentication to protect access to stored codes.
Google Authenticator is a strong choice for users who want a simple, established free option across Android and Apple mobile devices. Offline code generation is useful when an internet or cellular connection is unavailable, and support for both TOTP and HOTP covers the code types listed for the app. It is less suitable for organizations seeking team administration, or for users who expect push approvals instead of manually entering verification codes. Choose it when straightforward code generation, encrypted synchronization, and QR-based transfers are the priorities.
Google Authenticator pros and cons
- Where it wins
- Generates TOTP and HOTP codes without internet or cellular access
- Encrypted synchronization across devices with Google Account support
- QR-code setup and transfers simplify account migration
- Where it doesn't
- Works only with websites and apps that support authenticator codes
- Requires device authentication to use Privacy Screen protection
- QR transfers require access to both the source and destination devices
Google Authenticator fact sheet, pricing and score →
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