Around the time the Nintendo Switch was available, I saw a lot of dicussion about Rainway (Free) that would allow Switch owners to play PC games they own on the go through game streaming. That eventually never happened but I kept an eye on the service since then because it always had the best interface of all game streaming services. While a bit late to the party with Steam Link allowing for game streaming already, Rainway aims to do more with support for non Steam games as well. In fact the Rainway dashboard detected my older games that I have installed through GOG as well.

Rainway is available for free and to coincide with the iOS app launch, Venture Beat has an interview with Andrew Sampson (CEO of Rainway) where they talk about monetization and more. As of now, the company is not looking to ask users to pay and wants to focus on the product itself. I will be trying it later today to see how games like Total War Three Kingdoms and Ace Combat 7 work on my iPad. To get the app setup, you need to download the Rainway dashboard and link it to the iOS app once you setup an account.

Rainway supports MFi, PS4, and Xbox One controllers in addition to touch controls. If you’re interested in checking it out, you can download Rainway for free on the App Store for iOS here. It is a universal app. Have you been using Steam Link or any other streaming service for your PC games?
I'll likely stick with Steam Link for whenever I need to stream from my PC. You can easily add games from other launchers to Steam and then stream them, or minimize Steam Big Picture from the Steam Link, which gives you access to your entire desktop, and therefore every launcher anyway.
Rainway seems like a pretty app, but doesn't necessarily do anything that can't already be done if you have a Link. I'll still try it out, because I'm always curious to try new things.
I agree. I like Steam Link and I don't own very many PC games that are not Steam. I will try it out since it can't hurt to give it a go. Just like with Steam Link you have to be on same network as the PC. I hope soon we will be able to play them anywhere and not just basically in the same room as the PC.
"Just like with Steam Link you have to be on same network as the PC."
This is not true. I'm logged into my PC at home, from work, right now...running around in Destiny 2 on my ipad. Fairly unplayable due to lag though.
Do they make a client for macOS?