Raga Book is a free Android app developed by Aparna H, categorized under Multimedia, specifically Music and Radio. It is a comprehensive guide to Indian Classical Music, covering both the Hindustani and Carnatic systems.

The app provides basic details about all widely-used ragas, along with a recording of their 'Aroha' and 'Avaroha'. Users can also play the 'Aroha' and 'Avaroha' at six different pitch levels. The tutorial is easy to follow and accessible to music students of all levels.

One of the standout features of Raga Book is its offline usability. Users can access all the information and recordings without an internet connection. Overall, Raga Book is a must-have app for any music student or enthusiast looking for a comprehensive guide to Indian Classical Music.