Hello everyone! I’ve been nursing the same Phantom 3 Standard for 9 years now. Registered it right away in 2016, then several years later added Part-107 to my airplane license. Sad that it’s no longer being supported by DJI but I’ll keep maintaining it until it becomes unflyable.
~Thanks
Sgt. Ruben “Radar” Rodriguez
Welcome to the forum! 
I still have my Phantom 3 Standard from back when it was released. With my ever-growing collection of drones, that one rarely makes it out of its case these days.
Welcome from the Hampton Roads area of Virginia, USA.
If you need to reload the App, here is the DJI Link…
And here is the link to all their documentation, including the Manual…
Chief Master Sergeant “Comm Chief…”