I have used Davinci. Great application. I'm not a pro, but get some good post production work done. 4K video tends to challenge my i5 Dell laptop.
For smaller projects, I use Splice on my iPad. There is a small subscription cost.
Superb demonstration of DaVinci. I gave a look the the pc specs needed to work with it and I think that with a laptop i5, 16 GB Ram and no dedicated video card, I could not use it.
Any suggestion, apart from changing the pc?