Make sure your iPhone and Chromecast are connected to the same Wi-Fi network
Install and open a Chromecast-compatible app on your iPhone
Tap the Cast icon in the app
Select your Chromecast device
Start playing the content
To mirror your iPhone screen, use a third-party screen mirroring app that supports Chromecast
Follow the app’s on-screen instructions to connect and cast
To stop casting, tap the Cast icon again and disconnect