Watt Charging Speed: Meter

How fast is your charger, really? Plug in your iPhone or iPad and Watt Charging Speed shows you a live estimate of your charging power in watts — so you can tell a fast charger from a slow one, and find out whether your cable actually supports fast charging.

HOW IT WORKS — HONESTLY

iPhone and iPad don't give apps access to a hardware power meter. Instead, Watt Charging Speed estimates wattage by tracking how quickly your battery level rises, combined with your device's exact battery capacity. That means:

• Readings are careful estimates, not direct measurements

• Your first reading appears after a few minutes of charging

• The longer the app stays open while charging, the more accurate it gets

LIVE CHARGING SPEED

• Live wattage estimate while charging

• Color-coded speed indicator: Fast, Normal, Slow, or Trickle

• Animated charging ring and live session graph

• Estimated time until fully charged

BENCHMARK YOUR CHARGERS

• Create battery range tests (e.g. 30% → 80%) and time them precisely

• Compare chargers and cables under identical conditions

• See which charger actually performs best

CHARGING HISTORY

• Automatic session tracking with average watts, duration, and battery range

• Compare sessions over time to spot slow cables or aging chargers

PRIVATE BY DESIGN

• No ads, no tracking, no accounts

• All data stays on your device

• Works completely offline

GOOD TO KNOW

iOS pauses background apps, so keep Watt Charging Speed open while it measures — it keeps your screen awake during a session so nothing is interrupted.

Perfect for testing a new charger, diagnosing slow charging, or finally settling which of your cables belongs in the drawer.