In October 2014 Twitter launched Fabric, a platform for mobile developers that provides several tools to improve their mobile apps. To showcase the tools this platform provided we built Cannonball demo app, a word game similar to magnetic poetry, in which the user can create poems, share with friends, see the popular ones all using the platform features such as: digits, social login, twitter kit, mopub, crashlytics and answers.
I was the responsible to build, publish and mantain the open source Android version. A tutorial explaining how to build an app like that using Fabric features was also written by me. More details on the links below: