Viper Smartstart is the app. There is a phone app & a watch app. Not sure how to link to an App Store app, but if you just search for 'Viper SmartStart' (it's by 'Directed').
I ended up not getting a remote start, but as I recall there are several Viper remote starters, one with a 1 way remote & (at least) one more that included a two way remote as well. The 2 way is nice as you get confirmation that it worked or not. Although I suppose if you are using your watch or phone, there's really not a need for a separate remote.
It looks like there is at least one more system that offers it as well, Compustar Drone. I don't know anything about it, but did see an article about it.