RemovU R1 can connect to yours GoPro via Wi-Fi and allows you to control the camera, use a screen as a viewfinder - in LiveView mode you can see exactly what camera shoots.
However, with a slight delay (about 1 second).
Also, RemovU R1 lets you possibility to view captured videos that are stored on a flash card on camera.
There are 2 disadvantages:
1. If you have a new camera, you can not use RemovU R1 until you connect the camera to smartphone and configure Wi-Fi. RemovU R1 can only connect to the camera with per-configured Wi-Fi.
2. Delay in Live View mode more, than when camera is connected to smartphone.
Advantages:
1. The remote can be easily attached to the various subjects, it is really easy to use convenient if you shoot yourself.
2. Remote allows you to view your footage which is already on the camera.
3. From the remote control you can set up shooting modes.