A free app for Android, by Easy Keyboard.

Sanskrit Voice Typing Keyboard is an easy-to-use voice typing app for Android smartphones and tablets that enables you to type in the language of your choice with a variety of themes. You can choose from a number of different themes that you can customize with the colors you prefer. The keyboard will also be ready to type as soon as you speak. 

This is a free and simple app to use, so there are no hidden costs. You can use it on your phone or tablet, and you don’t need to download any other apps. You can use it on your Android device to type in English or in Sanskrit. The English keyboard layout is similar to the English language, and the words are in English.