I finally installed my OpenGarage a few days ago and now have developed an app to control it. The first version is working now however I am going to try and add a few more features before publishing to the app stores. The app is built on AngularJS and Ionic.
PhoneGap Build: https://build.phonegap.com/apps/2299326/builds
Change log: https://github.com/OpenGarage/OpenGarage-App/commits/master
For now, Android users may install the app from the PhoneGap Build link above so long they allow 3rd party apps. Soon, a web app version will be hosted as well as the app store versions. Please post any problems/bugs and I will try to hammer them out. The app has currently only been tested on my setup. With all of that said, Enjoy!