Seems like a really great idea, maybe it's just my android device but i have tried all settings including "allow all apps to run in the background" and the geofence option still rarely works. The rest works as expected. It heats when needed...
I love being able to control my home's temperature through my phone. Also,I love being able to see what the temperature is in each room that I have Air Sensor with my T9 Thermostat.