There is also an alternate app called paranoids pal on fdroid, that’s new and maintained, it did not work reliable on my phone, maybe it works better for you.
And I’ve used private lock for years and still sometimes lock the phone accidentally, but for me the inconvenience is acceptable because of the security gained.
I’ve been with 1984.is for a couple of years now. I think my domains cost around 12 Euros a year each. Their web GUI works fine and I’ve never needed to contact their customer service, so I cannot comment on that.