During those past weeks, I've been developing an alternative to the Hello Smart for Android.
The result, called SMore# (for Smart More#), is available as an open beta early release on the Google Playstore. It provides the commands for open/closing, charge control as well as climate control and it displays many data points of your car, available through the Smart API.
Easiest access is to search for "SMore#" in your Playstore and it should be found. Sign up for the beta and you're good to go.
The full release should happen soon. Enjoy the app with comments welcome
SMore# - Alternative App for Android