Network Discovery is a free app for the Android device. The good thing is that the app doesn’t need a rooted device. This app has a simple and easy to use interface. It views all the networks and devices connected to your Wi-Fi network. The application identifies the OS and manufacturer of the device. Thus the app helps in information gathering on the connected Wi-Fi network.

Download app from Google Play: https://play.google.com/store/apps/details?id=info.lamatricexiste.network