Tap your Profile Picture (top left) → Settings → Steam Store (or just scroll to find “Store”).
Tap “Continue” → “Activate” → confirmation of game added to library. ⚠️ This method is finicky. If it fails, use Method 2 below. Method 2: Using Your Mobile Browser (Recommended) This is the most reliable way on a phone or tablet. steam app activate key
If you don’t see it, directly visit: https://store.steampowered.com/account/registerkey Tap your Profile Picture (top left) → Settings
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. If it fails, use Method 2 below
Scroll down and tap “Store” from the bottom navigation bar (if visible). If not, tap your profile picture and choose Account Details .