The P4 RC has a P-A-S switch now. The F mode is missing, which would normally enable 3rd party apps. Since F mode cannot be put into the Go app (since two apps can't run at the same time) to enable 3rd party apps, how do suppose 3 party apps will be turned on? I wonder if our friends at Litchi and Autopilot can chime in on this. When emailed DJI support about this their answer was "it's recommend to fly P4 with the Go app". Hmm.