In 2015, I created an iOS app for Tesla so that Apple Watch users could control their Teslas from their watch. Since then, a large percentage of Tesla owners have started using my Remote app for their iPhones as well since it connects faster, exposes more car stats, keeps a location history, shows charging information from your last session, and has less restrictions when using Summon/HomeLink (no need to be near the car and no need to hold down the button). There's also Siri Shortcuts support so that you can do things like open your trunk by talking to Siri, combine commands in the Shortcuts app, and even summon your car by talking to your watch (see video:
I'm starting this new forum thread to answer all questions, bug reports, UI suggestions, and feature requests for the app. The app currently works for the Model S, 3 & X.
Download link: http://itunes.apple.com/app/id991623777?mt=8&at=11l4Ui