The best feature of countly was its easy integration with google play services which helped us in tracking user interaction from multiple apps simultaneously without any hassle at all. We used it for our android application as well where we were able to find out what kind of users are using my app or not etc. Also I think there should be more integrations available like facebook API so people can easily integrate their account into this platform. So far i am satisfied but still if anyone needs help then they will get me anytime because thats how much helpful I am :). Tracking user interactions through different platforms such as Android/iOS.