Keyboard Checker is a free utility app developed by BOGN Studio for Android devices. It is designed to check the button operation of the hardware keyboard by simply connecting it to your device.

With Keyboard Checker, you can easily test the functionality of all the buttons on your hardware keyboard. The app provides a simple and user-friendly interface that allows you to see which buttons are working and which are not. You can also use it to check the sensitivity of the keys and ensure that there is no delay or lag in the response.

Overall, Keyboard Checker is a useful tool for anyone who uses a hardware keyboard with their Android device. It is a great way to ensure that your keyboard is working properly and to diagnose any issues that you may be experiencing. Best of all, it is completely free to download and use.