Make sure your iPhone and Chromecast are connected to the same Wi-Fi network
Install the Google Home app on your iPhone
Open the app or streaming service you want to cast from
Look for the Cast icon
Tap the Cast icon
Select your Chromecast device
Start playing the video, music, or content
To stop casting, tap the Cast icon again and disconnect
If the app does not support casting, use screen mirroring through a compatible app or device setup