Open channel3.gg in Chrome. Click the Install icon in the right side of the address bar:
Click Install when you get this prompt.
After installation, you can pin to the Windows taskbar alongside your other favorite apps.
Open channel3.gg in Safari. It has to be Safari.
Tap the Share button in the middle of the footer.
Tap Add to Home Screen.
Tap Add on the prompt.
BOOM. You're done. iPhones try to act like it's "just a website bookmark" because they want everyone to go through the App Store but really it functions just like an app... Full screen, moveable icon on your home screen. All of it.
Enjoy.
Install the Channel 3 app from the Google Play Store.
I love my Stadia, but it never got the support that it needed from the get go. Still, this system has some really good games, and the controller feels very nice. Hopefully though, you have good enough internet to smoothly play