I'm a user of Gaana app. As per my experience , The concept and performance of the app is good but it drains my phone battery so quickly and sometimes it gives me an error when I add a song to my playlist. Other features and functions is working properly. Top charts feature is one of my favorite feature of this app. I need to travel long distance so much times and while traveling, I love to Listen music but I can't use this app many times because this app is very heavy and it drains my phone battery so fast. Developer of this app has to do some changes to make this app more useful and fruitful for us.
Hope these issues will be resolved soon.