https://www.pcgamer.com/steam-link-app/

I bought a Steam Link a while back, and while I don't use it terribly often, it's a purchase I've been quite happy with: It's easy to set up and use, and streams games from my PC to my TV smoothly and reliably. I even bought it at 50% off, which means the only times I'm unhappy with it is when I see it on sale for 90% off. So, I wasn't especially thrilled when I learned last week that Valve is releasing a Steam Link app that sounded like it could make my physical Steam Link box completely obsolete. The free app for Android and iOS lets you stream games to connected devices like phones, tablets, and TVs.

After a few days of trying out the Steam Link app for iOS (I don't own an Android), I can say pretty confidently that it doesn't make my Steam Link box destined for the scrap heap. The app works, and often quite well, but it's not as smooth or reliable an experience as the actual Steam Link box has been.