A free program for Android, by RVDSoft.

Game Collection Tracker is an app that will help you manage your video games, and keep track of what you have, what you play, and who you play with. You can even keep track of the achievements of your favorite games.

This application has the advantage of being able to be used in offline mode, so you don’t need to be connected to the Internet to use it. You don’t need to worry about the privacy policy of the website you use to log in, as this application has its own privacy policy. The only thing you need to do is to log in with your email address and your password.