Internet Speed Meter is a free, ad-free app developed by GreenLeaf Inc for Android devices that monitors your internet speed and usage. With this app, you can monitor your internet speed in real-time, and it provides updates in the status bar, screen-lock, and notification.

The app also includes a notification monitor tool and internet speed meter settings to notification-bar and speed meter information. You can see the internet and WiFi download and upload speed, and the app has been designed with Material Design principles. Additionally, there are several customization options for widget and notification, and the app is lightweight and battery efficient.

Overall, Internet Speed Meter is a useful tool for those who want to monitor their internet speed and usage on their Android device. It's easy to use and provides real-time updates, making it a great addition to your device for those who want to monitor their internet usage.