Because mobile Safari runs in a web browser sandbox, Safari cannot read steps taken while your phone was closed in your pocket without a native bridge.
⚡ Option 1: Native App (Capacitor)
Compile into a native iOS app using Xcode. Runs directly on your iPhone with full 24/7 background HealthKit access.
🔧 Option 2: 1-Tap iOS Shortcut (Test Now!)
Open the iPhone Shortcuts app → Find Health Samples (Steps, Today) → Open URL with ?sync_steps= to bank steps with 1 tap.