Your Apple Watch has limited storage compared to an iPhone. If it’s nearly full, new apps cannot be installed. : Go to Settings > General > Storage .
: Swipe up on your watch to access the Control Center , turn on Airplane Mode , wait 30 seconds, and turn it off again to reset wireless radios. apps won't download apple watch
: Ensure both are enabled on your iPhone and Apple Watch. Your Apple Watch has limited storage compared to an iPhone
The most frequent cause of installation failures is a breakdown in communication between your devices. turn on Airplane Mode