Over the past 6 months I created an open source tool that helps you build a custom app for your device. The tool consists of a hardware SDK, an Android app, and an Android SDK.
Here's a link to the project with more details: GitHub - ScottCypher/BreadMote: Your remote breadboard. Add an app to your hardware in minutes
Any feedback on the project would be greatly appreciated. If you want to help make the project even better, feel free to reach out to me!