Fair enough.

I decided against web/network-based password managers for my personal needs since the additional attack surface is a concern. A Keepass database file synced across machines strikes a good balance for me (requires password + keyfile to open). It’s also simple to backup and protect.

So yeah, for you use case, I’d recommend Aegis Authenticator.

No, I’m not interested in a password manager, thank you

Ok. But since you already use a password manager (right?), why not use its built-in TOTP management. Why do you need yet-another-separate app?

If I really had to, I’d recommend Aegis.

But I’ll still recommend using a password manager (I use KeepassXC on desktop and KeepassDX on Android).