Aegis is amazing for standard TOTP (6 digit code that changes every 30 minutes), but there are also proprietary OTP that require own apps and usually do not support export and would require to set it up from 0. Microsoft for example have push notifications that I love and prefer over TOTP, but for recovery purposes I have TOTP added in Aegis as well so if I ever loose MS Authenticator data, I will not be locked out.