Just so, can you fly the Mavic pro without a phone?
Yes it flies just fine without a mobile device attached. You won't have access the intelligent flight modes though as they need the app.
One may also ask, can you fly DJI Mavic pro without Internet? Yes you can fly without wifi or cell data. The maps can be examined and cached at home if desired for use when no wifi or cell available. As DJI Stephen points out make sure you have logged into your DJI account on the DJI Go 4 App' you are using when at home.
Secondly, can you fly a DJI drone without the app?
If you can fly without the app, but is not advisable. You can start your Phantom pressing down and diagonally to the center of the RC with the two joystick. From here Lift it and control it.
What phones are compatible with Mavic pro?
Compatible with Samsung S8 ,Samsung S7 edge, Samsung S7, Samsung S6, Samsung S5, Samsung NOTE4, Samsung NOTE3, Samsung tabs 705c, Ascend Mate 9, Ascend Mate 7, Huawei Honor 8, Huawei P8 Max, Vivo X7, Xiaomi 5, Google Nexus 6p, Nexus 9, Google Nexus 7 II, LG V20. Thank you for your reply.