File Extensions is a free Android app developed by Pranav Davda. As the name suggests, it is a comprehensive collection of file extensions that helps users find any file extension with ease. The app provides a full bundle of file extensions, including .png, .jpeg, .exe, .dmg, and .txt, among others.

One of the most efficient ways to use the app is to update the database regularly. The app also provides users with a special post extension tab where they can suggest any file extension they couldn't find. Moreover, the app's smart search function makes it easy to find any file extension by simply typing it. As you type, the app suggests relevant options in real-time, making it easy to find what you need.

Overall, File Extensions is a must-have app for anyone who frequently works with different file types and needs a quick and easy way to find the right extension.