The privacyIDEA Authenticator currently implements the HOTP and TOTP (30 and 60 seconds) algorithms with SHA-1/SHA-256/SHA-512. It can scan QR codes according to the Google Authenticator Key URI.
The privacyIDEA Authenticator also provides a more secure way of enrollment as specified in our smartphone concept as well as the pushtoken with support for user-configured firebase projects.
The App is best used with the privacyIDEA Authentication Server.
The Android App can be found here.
See the issues.
Ideas and pull requests are welcome.