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? How do I update the camera firmware version? Is there a QR code for YI 4K Action Camera? What are the key YI 4K Action Camera features? Comments 0 comments Please sign in to leave a comment.