I heard more recommendations for Aegis than for Ente and evaluation the code of Ente Auth would take me too much time and I certainly lack also expertise to check the code properly and with confidence. But it's better to have more good options than fewer. I'll give both Aegis and Ente Auth a closer look and try after a quick scan over their codebase (I'm not too happy with the options that FreeOTP gives me. Yes, I can save backups, but I'd want to export individual OTP accounts on occasion.)