[regecks]

There is a clear reason not to use Authy, which is that making your data portable is extremely annoying. No export function. I ended up writing a 3rd party Authy client just to get my TOTP keys out.

For iOS users, I cannot say enough good things about https://apps.apple.com/us/app/otp-auth/id659877384. Author is responsive, encrypted backups, portable data format.

[Macha]

For android users, Aegis provides much of these benefits (as does andOTP). Both are open source, I like aegis a bit better.

[SailingCactus33]

andOTP has just worked for me across multiple device migrations for years. Encrypted backups to a git repo for mobile files managed with MGit.

[nicce]

Thanks. I have been looking replacement for Authy for quite some time because of no export function.

[RamRodification]

That's good one. Thanks.