I haven't got a lot of time today for posting so I just want to show which OTP Authenticator I use on Android.
The authenticator that I use is called andOTP and is available on the F-Droid store. It is easy to use and has all the features you'd want from an OTP authenticator. The app is still maintained and looks quite modern unlike some other Android apps that I've tried.
Its source code is fully open and the app is licensed under the MIT license. I much prefer this app over the proprietary apps like Google Authenticator and Authy. If I use an app for security reasons I'd like it to be open source.
Feedback or Questions?
I don't have a direct way to leave comments on posts. But if you want to give some feedback or have some questions you can contact in other ways.