Add an option to set a specific time to turn on climate control each day of the week. Once the desired cabin temperature is reached, perhaps it turns off after a few minutes.
Preheating the cabin manually using the app is inconvenient, if you like to do this every day at the same time, e.g. in Winter commuting. Ideal for situations when the automatic preconditioning does not work well.
Some other cars offer a schedule option such as the BMW i3 and Jaguar I-Pace.