Google Cast and Chromecast are not the same thing, though they work together

Google Cast is the technology that lets you send video, music, or photos from your phone or computer to a screen. Chromecast is the device you plug into your TV to receive that signal. Think of Google Cast as the invisible connection and Chromecast as the physical box that makes the connection work.

When you tap the Cast button on your phone while watching YouTube, you are using Google Cast technology. The Chromecast device in your TV's HDMI port is what actually displays the video. Many other devices now support Google Cast — smart TVs from Samsung and LG, soundbars, projectors — so you can cast to them without owning a Chromecast at all.

The confusion happens because Google originally called the device "Chromecast" and the technology "Google Cast," then later renamed the technology to "Google Chromecast" in some places. The device itself is still called Chromecast, but the underlying system that powers it is Google Cast.

Key Takeaways

  • Google Cast is the wireless technology that sends content from your device to a screen; Chromecast is the physical device that receives it.
  • You can use Google Cast to send content to any device that supports it — not just Chromecast hardware.
  • Many modern smart TVs, soundbars, and speakers have Google Cast built in, so you do not need a separate Chromecast device.
  • If your TV does not have Google Cast built in, a Chromecast device plugged into the HDMI port adds that capability.

How Google Cast technology works

Google Cast works by creating a direct connection between your phone or computer and the receiving device over your home WiFi network. When you press the Cast button in an app like YouTube, Netflix, or Spotify, your device sends a signal to the Chromecast or other compatible device telling it what to play.

The receiving device then streams the content directly from the internet, not from your phone. This is different from screen mirroring, where your phone sends everything on its screen to the TV. With Google Cast, your phone is just giving instructions — you can lock your phone, switch apps, or even turn it off and the video keeps playing on the TV.

Google Cast works with apps that have built-in Cast support. You will see a Cast icon (it looks like a rectangle with WiFi waves) in apps like YouTube, Spotify, Google Photos, and many others. If an app does not have the Cast button, you cannot use Google Cast with it.

What devices support Google Cast

Google Cast is built into many modern devices, not just Chromecast hardware. Most smart TVs from Samsung, LG, Sony, and TCL include Google Cast. Many soundbars, portable speakers, and smart displays also support it. You can check whether a device supports Google Cast by looking for the "Works with Google Cast" badge on the product page or in the manual.

If your TV or speaker does not have Google Cast built in, you can add it by plugging in a Chromecast device. Google makes several versions: the standard Chromecast (plugs into HDMI), Chromecast with Google TV (includes a remote and apps), and Chromecast Audio (for speakers). Each one adds Google Cast capability to whatever device it connects to.

Older devices without Google Cast cannot receive a cast signal, even if they are "smart" in other ways. A TV that streams Netflix directly but does not have Google Cast built in will not receive a cast from your phone.

Chromecast devices and their purpose

A Chromecast device is a small piece of hardware that plugs into your TV's HDMI port and connects to your WiFi network. Its only job is to receive Google Cast signals and display the content on your TV. It does not have its own apps or menu — it sits idle until your phone sends it something to play.

Chromecast with Google TV is different. It includes a remote control and a full interface with apps, so you can browse and play content directly on the TV without casting from your phone. It still supports Google Cast, but it also works like a traditional streaming device.

The original Chromecast and Chromecast Audio are no longer sold by Google, though they still work if you own one. Google now focuses on Chromecast with Google TV, which combines casting capability with a full streaming platform.

When you need Chromecast versus when you do not

You need a Chromecast device only if your TV does not already have Google Cast built in. If you bought a smart TV in the last few years, check the manual or settings to see if it supports Google Cast. Many do, and you can start casting when ready without buying anything extra.

You might want Chromecast with Google TV even if your TV has Google Cast, because it adds a remote, a home screen with app shortcuts, and voice search. It turns your TV into a more complete streaming platform. The standard Chromecast is cheaper but requires you to use your phone to control what plays.

If you have an older TV without Google Cast and do not want to buy a new one, a Chromecast device is an affordable way to add casting capability. If you have a newer TV with Google Cast already built in, you do not need to buy anything — just use the Cast button in your apps.

Screen mirroring versus casting

Screen mirroring and casting are often confused because both send content from your phone to your TV, but they work differently. Screen mirroring copies everything on your phone's screen — apps, notifications, battery indicator — and displays it on the TV. Casting sends only the content you choose and lets your phone stay private.

Google Cast is a form of casting, not mirroring. When you cast a YouTube video, only the video appears on the TV, not your phone's home screen or other apps. Your phone can be locked or used for something else while the video plays.

Some Chromecast devices also support screen mirroring as a separate feature, but they are not the same thing. If an app does not have a Cast button, you might be able to mirror your screen instead, though it uses more battery and is slower.

Troubleshooting cast connections

If the Cast button does not appear in an app, the app may not support Google Cast. Check the app's settings or help section to confirm. Some older apps never added Cast support, and some newer apps have it only on certain platforms (like Android but not iPhone).

If the Cast button appears but casting fails, make sure your phone and Chromecast device are on the same WiFi network. They need to be able to see each other on the network to connect. Restart both devices and try again. If the Chromecast is far from your router, move it closer or move your router closer to it.

If your TV has Google Cast built in but you cannot find the Cast button in an app, check that your TV is connected to WiFi and that the app is up to date. Some apps require you to update before Cast support works.

Frequently Asked Questions

Can I cast to a TV that does not have Google Cast or Chromecast?

No. The TV must either have Google Cast built in or have a Chromecast device plugged into it. If your TV has neither, you can add a Chromecast device to enable casting. Some other devices like Apple TV or Roku also receive cast signals, but they use different technology.

Do I need WiFi to use Google Cast?

Yes. Both your phone and the Chromecast device must be connected to the same WiFi network. Google Cast does not work over Bluetooth or cellular data. If your WiFi is slow or unstable, casting may buffer or disconnect.

Can I cast from an iPhone to Chromecast?

Yes, if the app supports it. Many apps like YouTube, Netflix, Spotify, and Google Photos work with Cast on both iPhone and Android. Not all apps support casting on iPhone, so check the app first. You cannot mirror your iPhone screen to Chromecast the way you can with Android.

What happens to my phone when I cast?

Your phone sends a command to the Chromecast device, then steps out of the way. The Chromecast streams the content directly from the internet. You can lock your phone, use other apps, or turn it off completely and the video keeps playing on the TV.

Is Google Cast the same as AirPlay?

No. AirPlay is Apple's casting technology for iPhones, iPads, and Macs. Google Cast is Google's technology for Android phones and computers. They do not work with each other. Some devices support both, but they are separate systems.