eSmartRCU is a free Android app developed by ELINK SMART that provides a Bluetooth remote control experience for your set-top box. With this app, you can easily connect your Android device to your set-top box and control it as you would with a regular remote control.

The app's interface is simple and user-friendly. It allows you to easily navigate through your set-top box's menus and channels, adjust the volume, and perform other basic functions.

If you're tired of juggling multiple remote controls or losing them altogether, this app is definitely worth a try.