Which version are you using downloaded from Amazon App store ?
4.21.3 version is only for Android > 9
For Smart controller has not been update till now. I asked directly to Litchi support and they told me to wait for few weeks the update for smart controller
So I have gotten Litchi to stay up but for some reason the sensor’s reading are all over the place. If I’m facing an obstacle 15ft away it may unstably show 30ft-100ft away causing the distance alert not to response. I have a friend who is getting the same results. We both downloaded litchi from Amazon App Store. We have the phantom 4 pro+ v2.0.
The Phantom 4 Pro v2 is compatible and have been using Litchi on it since P4P+ v2.0 was released. I think you may be looking at the statement regarding the New DJI RC Pro Controller.
Update: I uninstalled / reinstalled Litchi again and gave my Smart Controller a thorough file cleanup. I deleted a bunch of old screen recordings, screen shots, etc.
On the ground, Litchi ran fine through a few start up and shut down cycles. I launched the drone and then ran one waypoint mission successfully. I will keep an eye on it, but it seems to be running more reliably now.
I installed Litchi on my Smart Controller today.
I started it up connected to Mini2 and for a few seconds the Litchi screen. appeared and all seemed to be ok. The the app crashed and its now locked in the on position but I cannot get out of it, it will not shut down . Has anyone else. experienced the same. just got to leave it till the battery runs down.