Raaga Sudhaarasa is a free Android app developed by Gytha Ogg, categorized under Education & Reference and subcategorized under Books. The app is an ever-growing collection of Carnatic compositions, complete with their raagam and composer information. Additionally, the app also features a simple quiz on raagam and compositions.

The app's interface is simple and easy to navigate. You can search for compositions by raagam or composer, and the app also allows you to create your own playlist. However, it is worth noting that the transliteration spellings are not yet fully consistent, but the developers are working on it.

Overall, Raaga Sudhaarasa is a great app for anyone interested in learning about Carnatic music. The app is free to use and constantly updated, and the quiz feature adds an element of interactivity to the learning experience. Keep the app up-to-date and let the developers know what you think.