Features of Authenticator App:
1. Password Protection
2. TOTP and HOTP types are supported.
3. It also supports SHA1, SHA256 and SHA512 algorithms.
4. Apps generate new tokens after every 30 sec (by default or user specific time).
5. After scanning a simple QR code, your account is protected or you can add manually details.
Privacy Policy:
https://sites.google.com/view/authenticator-privacy-policy/
Terms of Use:
https://sites.google.com/view/authenticatortermsofuse/