Please leave directions from downgrading the app on andriod and IOS, so I not lose my drone.

I found one and was wondering if it is okay.

Wish they had this for iPhone I just can't get any other downgrade to work and Charles proxy wont work for me.

Isnt 3.1.2 good on IOS?

Here is one way:

1. Go to www.apkmirror.com
2. Search this site for, "DJI"
3. Select the GO APP version you want, then follow the on screen instructions for downloading
4. Uninstall your current GO APP via the Google Play site
5. Use your device's file manager to find and delete all the DJI, or GO APP folders left behind
6. Use your file manager to locate the downloaded *.apk file,  named something like;  dji.pilot_3.1.1-79_minAPL1(..............   The first three numbers are the version of the GO APP
7. With your file manager open the *.apk file, it will load its self
8. Open the GO APP and check all of the setting as they may have changed from what you had set up in your previous version
9.  If the video down link is off (no camera view on the APP) Reset the link with the S2 switch

The above is how I have accomplished the change and is not to be considered an authoritative or approved method.  

That is what I did.