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Google Authenticator vs Clockwork: catalog facts
Google Authenticator	Clockwork
Free Free to download and use.	Free Free and open source under the MIT licence.
Android, iOS	Android, Web
Generates codes without a network connection Optional sync of codes across devices via a Google Account	Android app has no internet permission at all Imports secrets, otpauth links, QR images and migration exports
Cloud sync ties your codes to a Google Account Not open source	No cloud sync or backup between devices Stores nothing by default, so secrets must be re-entered unless the vault is on
Downloadable app	Downloadable app, Web application
Closed source	Open source
License not stated	License: MIT
Not stated if an account is needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.