UPDATE 02/12/2020 –
Due to changes to the iOS platform, the YI Action App is currently unavailable on iOS devices.
Performance amongst current iOS users may vary, and we strongly recommend all users record their footage locally on to high capacity microSD card for the most reliable experience.
With the recent release of iOS 13, some YI Action app users have reported technical issues. We recommend you delete and re-download the YI Action app.
Please back up all of your YI Action app data before proceeding.
Then from your iOS 13 device, do the following:
Your YI Action App is now verified and ready to use.