How to cite a Google Play app?
This is how you can do so in the APA style:

APA Style Blog: How to Cite a Mobile App

If you were to translate the citation to another citation style, the pieces of information that you need are the author, name, and version of the application, and the operating system it was written for. You should also include where the app was downloaded from (in this case, play.google.com). Make sure any links are permalinks.