I can recommend these apps on Android (both are open source and have many features). Aegis Auth - https://play.google.com/store/apps/details?id=com.beemdevelop

I can recommend these apps on Android (both are open source and have many features). Aegis Auth - https://play.google.com/store/apps/details?id=com.beemdevelopment.aegis https://play.google.com/store/apps/details?id=com.beemdevelo... andOTP - https://play.google.com/store/apps/details?id=org.shadowice.flocke.andotp https://play.google.com/store/apps/details?id=org.shadowice....