The free Chromecast Streamer app lets your mirror your iPhone's screen to any Chromecast device on the same Wi-Fi network. Replica is free to download and use for two weeks, but requires a paid subscription after that. Certain apps, including YouTube, also let you mirror your screen without any special add-ons. Being able to mirror your iPhone onto a TV might come in handy if you want to share your photos and videos, or show off a cool game you've downloaded. This way, people can see your phone without having to huddle around the small screen. Now, certain apps (like YouTube, Netflix, and others) let you cast specific videos or pages to a Chromecast without much trouble. And normally, the only ways to fully mirror an iPhone screen would be using an Apple TV or a physical cable.