A: Yes, for paid games. Free games or demo keys usually do not increase your library count.
Log into the Steam mobile app.
Go to the Steam website: https://store.steampowered.com steam app activate key
Inside Account Details, look for “Add funds to your Steam Wallet” – do not tap that . Instead, tap your Profile Picture again and select “Logout” (yes, really). This forces the app to reload. A: Yes, for paid games
Review the product name. Tap “Activate” . steam app activate key
Tap the “Sign in” button (top right). Log in with your Steam credentials and Steam Guard code.
However, there’s a catch: like the desktop client. Instead, you must use the mobile web browser or a hidden workaround within the app.