I'm just repeating DJI has said over at their forums. I agree things sound fishy and contradictory. We will see if orders start shipping on the 15th as they have started multiple times.
DJI has stated that if you didn't order from them withing 2 hours after the announcement. You did not back the first shipment which go out Oct 15.
This includes the orders from their Amazon store.
Supposedly reviewers had access to a Beta version. I'm not sure if this is it or not. We will know when DJI pushes the update to the play store and compare build numbers.
Version number is v3.0.0(498)
I'm on a Nexus 6P running Android 7.0.
The app update has not been pushed to the play store yet but here is the direct link from DJI:
http://m.dji.net/djigo
DJI website now says this on the Mavic page
"Shipping estimation: Within November on a first come first served basis."
So either all the October units have been bought, or they pushed everyone until November...