In the DJI Go app (iOS) the RTH alt and Max altitude are represented in Meters and not Feet even though I've choosing Imperial as the measurement units in the General Settings tab.
RTH alt is a critical setting and I should be able use my local units in this app.  Excuse my USA centric brain, but when I fly to a safe altitude to check for obstructions, the Camera app shows the alt in Feet.  Then I have to convert that to meters (literally on the fly) in order to enter a safe alt in the app.  

I hope DJI will consider updating this soon.

Otherwise, I've been having a good time flying and learning about this platform.  

+1 Good suggestion IMO.  Enjoyin mine too.

I noticed this on DJI GO with the Phantom 4 as well. The RTH values are metric, regardless of whether you specify imperial. I had my RTH at 400, assuming it was feet, but it was meters, and my P4 shot up to almost 600 feet before I caught it, and brought it back down. When you change the setting, it should be global throughout the application.