iOS has never shown charging wattage. You plug in a cable and get a lightning bolt — no idea if it's 5W or 20W.
WattCheck estimates real-time wattage by tracking battery % rise against your iPhone's known capacity. No dongle, no extra hardware.
Plug in → watch the speedometer go from Bicycle to Jet.
⚡ Compare cables side by side
📊 Session history
🎯 Fully native SwiftUI
🆓 Free with ads · $1.99 one-time, no subscription ever