As stated above the DJI RC is locked down and you can not install any other Apps
On the DJI smart controller, you can side-load apps
Have a look Here
But…With the latest releases of the DJI app no images are stored on the device, you have to transfer them with the quick transfer tool
So it makes no difference which device you use you still have to get the images to it
So you might as well just transfer the ones you want to your phone that already has the apps on that you need for social media 