Based on App Annie intelligence, here are top Categories of iOS and Google Play apps in Q1 2015.

Top Categories by Downloads - iOS App Store

1 Games

2 Photo & Video

3 Entertainment

4 Social Networking

5 Lifestyle

 

Top Categories by Revenue - iOS App Store

1 Games

2 Social Networking

3 Music

4 Education

5 Entertainment

Top Categories by Downloads - Google Play

1 Games

2 Tools

3 Communication

4 Photography

5 Entertainment

 

Top Categories by Revenue - Google Play

1 Games

2 Communication

3 Social

4 Tools

5 Education