Simple OTP was put together after Twillo decided to kill of the Authy desktop app, leaving only their mobile offering. Simple OTP was designed to be a replacement. Note Authy has no way to export their data, so switching from Authy requires redoing your passwords.

This project is written in flutter so it can run on the major platforms. (Linux, MacOSX, Windows, Android, iOS). It's licensed with the Apache 2.0 open-source license and I have no desire to make this complicated with tons of feature. It's a good beginner flutter app.

Sure, Java can run on all the above platforms too. I could have used libgdx even to get a nice well rounded basic UI even. But really, that's overkill. Flutter works fine and is currently supported by Google... until they decide to kill yet-another-project.

Please do! Send in ideas as issues in the Simple OTP project, fork the repo and make pull requests.

Please don't! The only complexity I'm considering adding is someway to sync databases between devices. But I want it in a way that doesn't require a back-end service and is easy for the user.

It's open-source. Just follow the Apache 2.0 license. Have fun and let me know.