Device · 7 tools
Device & Sensor Tools
Your phone already contains an accelerometer, a magnetometer, a microphone and a camera. These tools read them directly in the browser, with no app install and no data leaving the device. Sensor access always asks first, and always says what it does with the reading.
Available now
7 of 7Bubble Level
A spirit level using your device tilt sensor, with calibration.
Decibel Meter
Measure noise with peak, average and L10, then export CSV.
Chromatic Guitar Tuner
Cents-accurate tuning with alternate tunings and a strobe view.
Compass
Magnetic and true north, with bearing lock.
Microphone Test
Check input level, clipping and stereo channels, then play it back.
Webcam Test
Measured frame rate and real resolution, not just a preview.
Screen Flashlight
A bright, colour-adjustable light with a signal-flash mode.