Watt Charging Speed: Meter
Charger & Cable Wattage Test
USD 0.99 · Designed for iPad. Not verified for macOS.
How fast is your charger, really? See live watts while you charge, benchmark your chargers and cables, and spot the slow ones holding you back.
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.
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
Improved timing of the rating prompt — it now only appears after a completed measurement or benchmark, never during one.
The developer, Sindre Sørensen, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Sindre Sørensen
- Size
- 2.1 MB
- Category
- Utilities
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - iPad
Requires iPadOS 26.0 or later. - Mac
Requires macOS 26.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.0 or later.
- iPhone
- Languages
English and 15 more
- English, Filipino, French, German, Indonesian, Italian, Japanese, Korean, Malay, Norwegian Bokmål, Portuguese, Simplified Chinese, Spanish, Thai, Turkish, Vietnamese
- Age Rating
4+
- 4+
- Copyright
- © 2026 Sindre Sørensen
