Agreed -- doesn't matter whether it's iOS or Android, a mobile OS can and will shut down any app at any time, as the phone's resources and usage dictate. (I've seen apps get killed just because the phone rang...) A well-designed mobile app seamlessly adheres to this reality by having the ability save/restore its current state at any time, thereby providing the illusion that it kept on running when you switch back to it.So that is why I get a little nervous every time I read that the Tesla app "can be running in the background" in order to unlock your car... because how do I know that it is actually still running? That said, I doubt that Tesla would have gone all-in on a phone-based, fob-less unlocking mechanism if they didn't have a workaround (such as the Bluetooth-based one you identified a few posts back) and weren't 100% confident that it would be reliable.Personally, as an Android user, what I'd like to see is a "key fob" widget that I can drop onto one of my home screens, thereby allowing me to lock/unlock the car, flash the lights, etc without having the launch the app at all. That would greatly simplify the kind of scenario that @Insaneoctane describes... instead of:1. Pull out phone2. Unlock phone3. Find Tesla App4. Launch Tesla App5. Wait for Tesla App to load6. Find Unlock button (though it looks like it's immediately visible...)7. Press Unlock button.... it would be:1. Pull out phone2. Unlock phone3. Swipe to Home Screen where keyfob widget is located (if necessary)4. Press Unlock buttonI bet I could execute those four steps almost as quickly as I could perform the equivalent operation with a traditional keyfob.