To start with, Learn Sanskrit From Hindi is free to download on the Google Play Store; it doesn't require any payment to use it. The only thing that you need to do is to install it on your Android device. 

After that, all you need to do is to tap on the first button on the screen. From that point on, you will be able to choose the words that you want to learn. In the next screen, you will be given the meaning of the word that you have chosen.