Dhaatu Roopmala is an online app for learning the Sanskrit language. It is a free app that can be downloaded to the user's mobile. It is designed for all levels of learners. The app provides lessons for learning to speak the language and can also be used for studying the grammar. 

The app is very easy to use and comprehend. There are two options for studying the language: the first one is the free online mode and the second one is the paid mode. In the paid mode, there are more than 30 lessons and they are divided into three sections. 

All the lessons are very comprehensive and detailed. Each of them contains a comprehensive list of all the verbs, with their conjugation. Each one of them also contains a list of example sentences.