Marzipan
Well-known member
I've never used it, but it adds the ability to buy games, get notifications of sales for wish list items, remote game install, sign in via QR code and 2FA.
www.howtogeek.com

The Steam Mobile App Is Getting an Overhaul
You might not know Steam even has a mobile app, but as it turns out, it does. Obviously, you can’t download games to your phone from there, but you can keep tabs on your Steam profile and friends. Now, though, it’s getting a little bit better with the addition of several new features.
