It doesn't happen too often, but every once in a while, I'll start the conditioning via the app, but then realize I won't actually be going anywhere due to something last minute at work or a change in dinner plans. It would be nice if there was a way to cancel from the app so it's not running for 30 minutes for no reason.
If I'm at home, I can go out to the garage and turn the car on/off, but at work that's less achievable generally.