Use the Official GoPro app for your initial pairing. See link...
https://gopro.com/help/articles/block/How-to-Pair-the-Camera-with-the-GoPro-App
After that, Myk will connect to your camera automatically. Be sure your wifi does not shift to your internet connection. If it does, simply reconnect to the camera's wifi in your phone settings like you would any hotspot.