I use keepass, it’s a little more work than many closed source ones, but it’s only as online as you want it to be, and runs on anything

My “smart” bulbs are at the less online end of the spectrum, they host local wifi or bluetooth for configuration via their app, but even that can bite you

I added a wifi range extender to address the problem of stuff at one end of the house regularly losing connection and needed to point one of a particular brand at the new wifi

Its app hadn’t been updated and I needed to dig out my old phone stuck on an old version of Android to set the bulb up again

You lost a bit of credibility when you misspelt atoms

I use it mostly for family chats, I got the extended family to use it rather than Facebook Messenger

What makes you not trust signal as against WhatsApp?