# Watt Charging Speed: Meter — Charger & Cable Wattage Test

> Real-time charger wattage monitoring and comparison tool for iOS devices. (iPhone/iPad app by Sindre Sørensen.)

- Source: https://appshunter.io/ios/app/watt-charging-speed-meter/id6760211479 (this page in markdown: same URL + `.md`)
- Developer: [Sindre Sørensen](https://appshunter.io/developer/1881331882)
- Category: Utilities, Productivity
- Price: $1.99 (on sale, was $2.99)
- Rating: 4.40/5 from 8 App Store ratings · 5 written reviews indexed
- Age rating: 4+
- Requires: iOS 26.0 · 2 MB
- Languages: Norwegian Bokmål, Indonesian, Turkish, German (Germany), Italian, Japanese, French (France), Thai, Chinese (Simplified, China), American English and 6 more
- Released: 2026-03-10
- Data updated: 2026-08-21
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/watt-charging-speed-meter/id6760211479/reviews.md

## What is Watt Charging Speed?

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.

## Key features

- Real-time wattage display
- Color-coded speed indicator
- Estimated time to full charge
- Benchmark different chargers
- Charging history tracking
- Offline functionality

## Chart rankings

- #129 in Top Paid · Utilities (US App Store)

## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/watt-charging-speed-meter/id6760211479/reviews.md

### 1/5 — Does NOT work!

*2026-07-29*

Don’t waste your money

### 2/5 — Deceptive Description

*2026-06-19*

This app doesn’t actually give you “real time” wattage as it claims. It attempts to calculate based on battery level changes but this often yields absurd results which are not technically possible.

**Developer response:** You're right on both counts, and this review pushed us to fix it properly. Thank you.

The absurd readings came from how we calculated wattage: iOS only reports battery level in coarse 5% steps, often with a delay, and our old approach measured over a short time window — so a delayed level jump could produce spikes that were physically impossible. Update 1.1.1 replaces this: wattage is now measured between observed level changes, so both endpoints sit exactly on a step boundary, and readings that would be distorted by delayed reporting after unlocking are discarded. The impossible spikes are gone.

You're also right that "real-time wattage" oversold it. iOS doesn't give apps access to a hardware power meter — every reading is an estimate derived from battery level changes and your device's battery capacity. We've rewritten the App Store description to say exactly that, and the app now needs a few minutes before showing its first (reliable) number instead of showing a fast wrong one.

If you give 1.1.1 a try and still catch an implausible reading, we'd genuinely like to hear about it.

### 2/5 — 측정하기 너무 힘듬..

*2026-06-01*

화면이 꺼지면 측정이 안된다고 안내하면서, 화면은 자꾸 꺼지도록 되어있음. 계속 화면을 쳐다보면서 안꺼지게 터치해야함. isIdleTimerDisabled = true 가 필요함.

**Developer response:** 정확한 진단 감사합니다 — 말씀하신 그대로였습니다.

사실 앱에는 isIdleTimerDisabled 처리가 있었지만, 충전 상태가 "변경될 때"만 동작하도록 되어 있었습니다. 그래서 충전기를 먼저 연결한 뒤 앱을 여는 경우(대부분의 사용자가 이렇게 사용하시죠) 상태 변화가 감지되지 않아 화면이 계속 꺼졌던 것입니다.

1.1.1 업데이트에서 수정했습니다: 이제 앱을 열 때 이미 충전 중이어도 화면이 꺼지지 않으며, 앱이 다시 활성화될 때마다 설정을 재적용합니다. 더불어 측정이 중단되었더라도 세션 전체의 평균 전력을 표시하도록 개선했고, 벤치마크 테스트가 멈추는 문제도 함께 수정했습니다.

덕분에 가장 중요한 버그를 잡을 수 있었습니다. 업데이트 후에도 문제가 있다면 꼭 알려주세요!

### 1/5 — A fuir

*2026-05-16*

attention cet appli ne fait que calculer le temps entre un changement de % de batterie et estime une puissance de charge, ne vous faites pas avoir comme moi !

**Developer response:** Vous avez raison sur la méthode — et c'est justement le problème : notre description ne le disait pas assez clairement. Merci de nous l'avoir signalé, nous l'avons corrigée.

Pour être totalement transparent : iOS ne donne à aucune app l'accès à un wattmètre matériel. Estimer la puissance à partir de la vitesse de montée du niveau de batterie, combinée à la capacité exacte de la batterie de votre appareil, est la seule méthode possible — c'est ce que font toutes les apps de ce type. La nôtre aurait simplement dû l'assumer dès la première ligne.

Depuis, deux choses ont changé : la description sur l'App Store explique désormais honnêtement comment l'estimation fonctionne et ses limites, et la mise à jour 1.1.1 rend cette estimation nettement plus fiable (mesure entre les changements de niveau observés, plus de pics impossibles, moyenne de session après interruption).

Si vous lui redonnez une chance, nous serions heureux d'avoir votre avis — et si l'app ne vous convient toujours pas, votre critique nous aura au moins aidés à être plus honnêtes. Merci.

### 5/5 — Best modern tool -

*2026-03-29*

If you looking for decent tool that actually works get this

**Developer response:** Thank you for your review!

## Frequently asked questions about Watt Charging Speed

### What is Watt Charging Speed?

Watt Charging Speed is a utility app that displays your device's real-time charging wattage. It helps you identify fast vs. slow chargers and track charging history.

### How does Watt Charging Speed work?

Simply plug your iPhone or iPad into a charger, and the app will show the live wattage output. It also provides a color-coded indicator for charging speed and estimates the time to a full charge.

### Can I compare different chargers with Watt Charging Speed?

Yes, you can benchmark your chargers and cables by creating custom battery range tests and comparing their performance side by side within the app.

### Does Watt Charging Speed require an internet connection?

No, Watt Charging Speed is designed to work completely offline. It does not require an internet connection and all data stays on your device.

### Is Watt Charging Speed free to use?

Watt Charging Speed is a paid app, available for $0.99. It does not contain ads or in-app purchases.

### What devices are supported by Watt Charging Speed?

Watt Charging Speed is compatible with iPhones and iPads. It has an age rating of 4+.

### How often is Watt Charging Speed updated?

The latest version, 1.1.0, was released on April 22, 2026. Updates typically address performance improvements and new features.

### What do users think of Watt Charging Speed?

Based on the available data, Watt Charging Speed has a perfect 5.0-star rating from 3 reviews, indicating a very positive user sentiment.

## Version history (last 5 releases)

### 1.2 — 2026-07-31

Charging just got more insightful:
• Watt graph for every benchmark result — see how each charger performed over time
• Rename benchmark tests and charger labels
• Haptic feedback when you plug in, complete a benchmark, or save a session
• Smoother graphs during long sessions, improved translations, and bug fixes

### 1.1.2 — 2026-07-20

Improved timing of the rating prompt — it now only appears after a completed measurement or benchmark, never during one.

### 1.1.1 — 2026-07-04

This update makes measurements far more reliable:

• The screen now stays awake while measuring — also when you plug in before opening the app
• More accurate wattage estimates, with no more impossible spikes
• Long charging sessions now show your average speed even if the measurement was interrupted
• Fixed benchmark tests that could get stuck and never finish
• Charging sessions are saved to history more reliably

Thanks for all the feedback — keep it coming!

### 1.1.0 — 2026-04-22

• More accurate charging watts — readings are now capped to realistic limits for your device, so you'll never see impossible numbers again.
• Faster, smoother watt updates during a charging session.
• Watts-over-time graph is now saved for every session. Open any past session in History to see exactly how your charge ramped up and tapered off.

### 1.0.2 — 2026-03-29

Agora disponível em 16 idiomas!

Idiomas suportados: inglês, norueguês, japonês, chinês simplificado, coreano, alemão, francês, espanhol, português, italiano, turco, tailandês, vietnamita, indonésio, malaio e filipino

O app se adapta automaticamente ao idioma do seu dispositivo. Nenhuma configuração necessária. Todas as telas, rótulos e explicações foram completamente traduzidos.

## More apps by Sindre Sørensen

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All apps by Sindre Sørensen: https://appshunter.io/developer/1881331882

## Related topics

[watt charging speed](https://appshunter.io/ios/topics/watt-charging-speed) · [cable charging](https://appshunter.io/ios/topics/cable-charging) · [charging speed](https://appshunter.io/ios/topics/charging-speed) · [charging watt](https://appshunter.io/ios/topics/charging-watt) · [charging wattage](https://appshunter.io/ios/topics/charging-wattage) · [charging speed testing](https://appshunter.io/ios/topics/charging-speed-testing) · [battery charging speed](https://appshunter.io/ios/topics/battery-charging-speed) · [charging watts](https://appshunter.io/ios/topics/charging-watts)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-21.*