4DRC PRO

★★★★★ It does work well, but it's quite complicated it took me ages to figure it out I had to connect to the drones Wi-Fi first then go through with the calibration setups, and then I recently found out to get it to fly you have to press the lock button on the bottom left of the screen and then the propellers start to spin then from there you can fly it so all in all once you've finally figured it out it's a good app

★★★★★ App works fine for me as for as connection and flying the drone I just can't seem to get my cameras to come on in flight. It's connected for 6 seconds when it first connects to the drone than that's it. Can't see anything through the cameras or take pics or video.

★★☆☆☆ DON'T BUY 4DRC F9.Won't calibrate. Tried countless times in different areas. My other drones aquire satellites immediately but this one don't. The Wi-Fi shows as disconnected even though the phone says it is. When I fly without gps the drone is not smooth. It has a lot of self-made jerky corrections while hovering. Tends to wander so constant control is needed. It's a $100 lesson to NOT BUY Any more 4DRC!! Tried reconnecting Wi-Fi several times and after 1/2 hour still no calibration. Disappointment

★★☆☆☆ Will not connect to drone, 1s time it connected, and all functions worked, and now it asks to clear data.