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'm going to help the rating here. I was a day 1 Stadia user. I have NEVER had lag or a glitch or anything like that. I've used it on my Pixel phone, my Chromebook, and most of the time on my TV. It works. 100% it works better than they even said it would. I'm shocked sometimes when I realize I'm just streaming something. The hate this gets is ridiculous and 99% of the time it's from people who have never tried it, which makes no sense to me. I totally get it isn't for everyone but the tech works flawlessly in my experience. Plus since it came out they've given away like 100 games for free with the $10/mo Stadia subscription, everything from AAA games to fun indies.
My experience as well. I was a true believer. I would have never bought another console as long as I lived, had Google continued to support Stadia AND gotten new-release AAA titles.