You can also check out 2FAS, which recently got open-sourced.
I happened to be comparing this and Aegis so I'll add the biggest differences I noticed. Maybe it helps someone:
- Aegis is Android only, 2FAS is iOS and Android and they have a browser plugin.
- The browser plugin still needs you to approve via your phone/device.
- 2FAS has automated Google Drive backups. You can manually export if you backup via, e.g., Syncthing.
- Aegis has automated "external storage" (e.g., a folder on your phone) and "Android Device" backups—the latter are stored on Google Drive too, but, as far as I understand are used via a device restore (may not be as easy to drop these in as the other backup methods).
- 2FAS lets you secure with a 4-digit PIN and biometrics. Aegis let's you use a full-blown password and biometrics.