Any issues preventing you from installing Zwift on your iOS device are going to be due to compatibility issues with your iOS device, and we recommend contacting Apple if you need more assistance.
That being said, here's a few common reasons you may be having problems:
- Since Zwift is over 100MB, it will only download over WiFi.
- If you receive a message stating Zwift is incompatible, make sure that your device is supported. Minimum iOS and device requirements are in the app compatibility description section.
- Make sure you have enough free storage space available on your device
Full instructions for installing apps are on Apple's website.