Where can I find and download the YI Action app? You can find and download our YI Action app on Apple's App Store (iOS) and Google's Play Store (Android) separately. Related articles Where can I find and download the latest firmware? Where can I find the user manual? Is there a QR code for YI 4K Action Camera? How do I update the camera firmware version? What are the key YI 4K Action Camera features? Comments 0 comments Please sign in to leave a comment.