Ever noticed that some chargers and USB cables charge your device much faster than others? With Ampere, you can test and compare them!

Ampere show you how much power is flowing into your device’s battery, helping you find the best charger and USB cable combination for faster charging.

PRO features:
- Measurement in background
- Widgets
- Notification
- Alerts on device

Important Notes
- Not all devices support this app because some lack the necessary hardware for measurement.
- Ampere isn’t designed for 100% precise readings. It’s best for comparing chargers and cables rather than getting exact numbers.

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How to Use Ampere
- Open the app.
- Wait about 10 seconds until it measures.
- The charging or discharging current will be displayed.

What Affects the Charging/Discharging Speed?
- Charger (USB/AC/Wireless)
- USB cable quality
- Phone model
- Current apps/tasks running
- Screen brightness
- WiFi, GPS and other hardware activities

Think of this app like a kitchen scale—it’s great for comparing the weight of different fruits but not for precise scientific measurements. Similarly, Ampere helps compare chargers and cables, even if it’s not perfectly precise.

How It Works (Super Simple Explanation)

Imagine your phone's battery is like a glass of water. This app tells you how quickly that glass is being filled or emptied. The measurement is in milliamps (mA).

Charging (Filling the Glass)
- When you plug in your phone, the app shows how fast "water" (electricity) is flowing into the glass.
- A higher number means the glass is filling up faster!

Using the Battery (Emptying the Glass)
- When your phone isn’t plugged in, it's using the "water" from the glass.
- The app shows how fast the battery is draining, and the number is negative (e.g., -300 mA).

Real-World Example:
If your phone normally uses 300 mA, and your charger with your cable provide 500 mA, then the battery receives the extra 200 mA (shown as 200 mA on the display).

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Technical Details

- The app measures the battery current multiple times per second. Once enough data is collected, it displays the average. This process takes time but is necessary because the measurement values from the Android system can be highly variable and noisy.

- Readings may be unstable or even show 0 mA since Android doesn’t always provide consistent data.

- Battery type and hardware differences can also affect accuracy.

Please read also the FAQ: http://goo.gl/R8XgXX