How do I use it on my phone then?
> or store the database in sftp
SFTP where? The "cloud"?
> Why do people try so hard to use "cloud" based clearly unsecure solutions?
Because it is the easiest and most convenient and most useful.
I've switched to Bitwarden a few months ago, and I couldn't be happier.
2-) Sftp = not cloud, dedicated non-public server which you can also setup in your home environment such as a nas drive which only and only you have access to.
3-) I am convinced it is the safest, because no 3rd party is involved in my perfectly synced password system.