Tesla has just released their app, first for the Android phones and then about a week later, and about 5 days ago, for the iPhone. It’s pretty cool and will only get better as they add functionality over time. Right now there are 5 screens:
Home Screen, Controls, Charge, Climate, Location
They are all great, I particularly like the Climate function. It was mid-80s on Tuesday and I parked in an open lot an a jobsite where we are doing a project. By the time I was heading back to the car from the site, the interior temperature read 102 degrees. Pulled out the phone, set it for 72, walked a few hundred feet, and voila, cool car! And cool App!