You can change DJI Mavic Pro to Handheld gimbal camera with this thing.
[ Mobile phone holder ]
Galaxy S7 Edge : http://www.thingiverse.com/thing:2235844
iPhone 6/7/6+/7+/SE & Galaxy S7 : http://www.thingiverse.com/thing:2338865
BoM : Pair of M3 * 40mm Bolt and Nut
[ This is Non-Commercial !! ] Already someone copy design and sell it in AliExpress.