I'm looking at them for commercial use. I agree about terrain follow. The price of Maven and Litchi are both reasonable enough i just may get both and use the more appropriate one, depending on the circumstances.
What's the problem with DJI's intended app for the Mavic Pro... DJI GO4?
Since several years now you don't find it on the regular app stores... you need to get it directly from the DJI site & sideload it to your screen device.
Get it here for...