I'm still figuring things out, but I bought an Android tablet to use from home to activate the climate control prior to leaving. I do not leave on a regular schedule, so setting it up in the car doesn't make sense.
One strange thing with activating it from the app is that if the vehicle is already fully charged, it does not appear to turn on the charging circuit to draw power from the mains - rather it takes it from the batteries. This is not as useful as setting a charging time and departure time where it would all be done while still charging, and the batteries not be drained at all. Also, there must be a timer on it, and if you don't get to the car within a certain time after activating it, it can have stopped, letting the cabin return to whatever ambient temperature it is sitting in. Last time I did this, I got waylaid a bit, and when I went out to the car, I could see that it had been running (condensate was on the driveway), but it was no longer cool, and the cabin had warmed back up again.
My car is at the dealership getting a software update, and when I go back, I'll ask them about it, but wonder if anyone else has any insight on this.
2014 i3 BEV, 2021 X5 45e
(The i3 will be sold soon, <17K-miles, interested?)