This app is not published on the Google Play appstore and is simply a quick example on how to use the Riot League of Legends API. It prompts the user to enter a username and it then finds and displays their NA Solo Queue tier, division, and wins. All regions and additional queries are supported but not used in this app. The app itself is separated into two parts.
Annie is the League of Legends API wrapper. It handles query building, API requests, JSON parsing, object parsing, among other things. If you would like to launch this app you will have to put your Riot development key inside of the Dev object constructor.