Iphone 7 plus help

[GE8FTW]

So i bought the grand prix edition. I need help i can't preview the go pro hero 3 black edition on the app and i can't seem to overlay it either but if i hit record it starts recording both my phone and go pro but it won't let me just control the go pro or give me a view of what the go pro is seeing. any ideas?

[Harry]

Yes, you need to transfer the raw footage from GoPro to smartphone before you can watch or overlay it. Please have a look into Video Documentation available on www.gps-laptimer.de/documentation. It includes step-by-step descriptions on transfer methods by platform.

- Harry