I bought an Akaso V50 Pro. I am happy with the results and the price. Video at 4K is a little choppy because its on 30FPS at 4K but 1080p is nice and smooth and clear. 1080p records at 60FPS

Just to be clear I do not have a GoPro to compare it to. I am pretty sure the GoPro may be better but do not know that to be a fact.

You can google the Akaso V50 Pro and look at reviews on youtube. That helped me make up my mind. That and the price!

https://www.amazon.com/gp/product/B07CKV9FRX/ref=oh_aui_detailpage_o04_s00?ie=UTF8&psc=1