I don’t understand why voicemail really needs ti be a separate service involving forwarding and such. Couldn’t there be an app that picks up an unanswered call after a timer, plays a greeting, and records the reply? Couldn’t that all be on the device?
Or is there some technical limitation that I just don’t understand? I haven’t found any such app, and all voicemail apps seem to be services that forward calls remotely.


What would be the advantage? You could get the voicemail when you have service and then listen to it even if you don’t. But how often does anyone need to do that?
Greater digital independence. I currently use Voxist, which is… fine.
I don’t really want more corporate spyware on my phone from Google or my carrier or whoever. I’d prefer something FOSS, and private. That means on-device (or self hosted, but I don’t even know how that would work.)
It’s not on your phone, nor is it spyware. You call a number to access carrier voicemail. If you’re worried about them listening to your calls you may as well just not call anyone.