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Google Authenticator vs Stratum: catalog facts
Google Authenticator	Stratum
Free Free to download and use.	Free Free and open source under the GPL 3.0 license.
Android, iOS	Android
Generates codes without a network connection Optional sync of codes across devices via a Google Account	Encrypted backups with import from other apps and export at any time Supports TOTP, HOTP and mOTP
Cloud sync ties your codes to a Google Account Not open source	Android only, with no iOS or desktop version Only handles one-time codes, not passwords
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0
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 September 24, 2026

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