A Pluto.Studio app

Sensor toolbox for Android

Your phone is full of instruments. Most apps lie about them.

Sensor Lab turns the hardware already in your phone into 15 tools — and tells you plainly where each one stops being trustworthy. No invented readings, no certified-instrument claims it cannot back.

Get Sensor Lab on Google Play

Free with ads · One-time remove-ads purchase

Meters 4 tools

Sound level meter Built-in microphone A phone can show you useful relative sound levels — quiet room versus busy street versus power tool — but it is not a… Metal detector Magnetometer (the compass sensor) A phone detects metal by watching its compass sensor for distortions in the magnetic field. That works well for iron… Light meter Ambient light sensor A phone reports illuminance in lux using the small ambient light sensor near its earpiece. It is good for checking… Audio spectrum analyzer Built-in microphone The spectrum analyzer splits what the microphone hears into frequency bands, so you can see which pitches are present…

Motion & position 6 tools

Bubble level Accelerometer The accelerometer senses which way gravity points, so a phone can act as a spirit level. It is genuinely useful for… Compass Magnetometer, tilt-compensated by the accelerometer A phone finds north by measuring the Earth's magnetic field. It points to magnetic north rather than true north, and… Accelerometer readout Accelerometer The accelerometer measures acceleration along three axes, including gravity. A phone lying still reads about 9.81… Gyroscope readout Gyroscope The gyroscope measures how fast the phone is rotating, not which way it is facing. Many budget phones do not have one… Magnetometer readout Magnetometer The magnetometer reports magnetic field strength in microtesla on three axes. Away from interference the total reads… Gyro spin meter Gyroscope The spin meter converts the gyroscope's rotation rate into revolutions per minute. It works for anything the phone can…

Camera tools 2 tools

QR and barcode scanner Camera The camera reads QR codes and barcodes and shows you what they contain. On recent Android versions the built-in camera… Camera heart-rate check Camera with LED flash Covering the camera and flash with a fingertip lets the phone see the colour change of blood pulsing through your…

System & utilities 4 tools

Flashlight with strobe and SOS Camera LED (an output, not a sensor) Drives the camera LED as a torch, with a strobe mode and an SOS pattern in Morse code. Vibration tester Vibration motor (an output, not a sensor) Triggers the phone's vibration motor so you can check that haptics work and how strong they feel. Useful when… Device and sensor dashboard The Android sensor framework itself Lists every sensor the device reports, with its vendor, range, resolution and power draw — the direct answer to… Proximity sensor tester Infrared proximity sensor Tests the sensor that blanks your screen during calls. On most phones it reports only two states, near and far, rather…

Data logging 1 tool

Multi-sensor CSV logger Any combination the device exposes Records several sensors at once to a CSV file. Choose the sources and sample rate, watch a live chart while it runs…

The standout feature

Record several sensors at once, straight to CSV.

Choose your sources and sample rate, watch a live chart while it runs, then rename, share or export the log. The timestamps are in the file, so the data drops straight into a spreadsheet, Python or R.

Built for science projects, experiments and motion analysis — the part of the app that does real work.

How the logger works →

Your data

Readings stay on the device.

Sensor readings and recordings are processed on your phone and saved only inside the app. They are never uploaded. Ads use a standard Google advertising ID; that is the only data that leaves your phone.

Readings depend on your specific hardware and are meant for everyday and educational use, not certified measurement. The heart-rate tool is for fun and is not a medical device.

Every sensor your phone has, in one app.

15 tools and a multi-sensor CSV logger. Free, with a one-time remove-ads purchase.

Get Sensor Lab on Google Play

Free · No account required