How important is a well-functioning car app for an EV?

I have a Peugeot PHEV, and I'm definitely getting an EV when I next change my car. I'm in the early stages of deciding/researching what's around.

I love my Peugeot, but the MyPeugeot app is so broken it's worse than useless. Won't connect to the car, won't tell me my charge/fuel levels, won't set up a delayed charge, won't initiate remote climate control... always just times out, crashes, throws an error or logs me out. For a PHEV it doesn't really matter, but I imagine that for an EV I'd need to use the app a bit more actively for things like checking charge level, managing the timing of my charge (overnight), capping it at a set level, etc. Probably some other important functions I'm not aware of.

So how important is it to have a car app that actually works for an EV? Would a crappy app be a dealbreaker?