Magnetic Field Counter for Android

App summary

Magnetic Field Counter is an Android utility from keuwlsoft that uses your phone’s magnetic sensor to count magnetic events. Each time the measured magnetic field crosses a user-set threshold, the counter increments by one. The app is intended for general-purpose monitoring and hobby use.

How it senses magnetic activity

• Measurement rate is configurable across a wide range — choose from a set of 12 sampling frequencies (from about 0.5 Hz up to 2 kHz).
• It can report the magnetic field components along the device’s three axes (X, Y, Z) and the overall field strength (magnitude).
• You can select whether a count is triggered when the field rises above the threshold or when it falls below it.
• There’s an option to apply AC or DC coupling to the input, depending on whether you want to track rapid changes or long-term offsets.

User controls and anti-double-count measures

• Enable a post-detection pause (no-count wait) to prevent rapid re-triggering and reduce false multiple counts.
• Adjust the sampling speed to balance responsiveness against power and noise considerations.
• Choose a detection threshold that matches the sensitivity and noise characteristics of your device’s sensor.

Visuals and feedback

• A built-in graph plots recent magnetic field readings so you can see how values change over time; the recorded counts are marked on the chart for easy reference.
• Optionally turn on an audible “click” for every registered count to give immediate, tactile-like feedback.

Important limitations and safety notes

• Smartphone magnetic sensors differ in sampling speed, resolution, and absolute accuracy, so readings are indicative rather than laboratory‑grade.
• Avoid placing strong magnets directly against your device; this can damage the sensor or the handset itself.
• If the sensor behaves oddly after exposure to a strong field, gently rotating the device through all three axes (waving it around) often helps the sensor return to normal operation.

Alternate app suggestion

If you’re looking for different functionality or a comparable tool, consider RPM Meter Free — it provides similar magnetic-field utilities packaged with additional features geared toward varied measurements and user preferences.