Where can I find and download the YI Action app?(YI 4K+ Action Camera) 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 download YI Action Camera App?(YI 4K Action Camera) Where can I download YI Action Camera App?(YI 4K+ Action Camera) what are the requirements for the external microphone with YI 4K+ Action Camera What are the key YI Action Camera features? On what phones can I use YI Action app?