iOS
UPDATE 03/04/2020-
Remove all previous versions of the YI Action app, and install the latest version (ver. 3.9.07) from the App Store.
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.
Original post:
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.