Compass, Decibel Meter & Level

Nine measuring tools that use the sensors already in your phone.

MeasureKit puts a compass, decibel meter, bubble level, ruler, magnifier, protractor, inclinometer, vibration meter and lux meter in one app.

No account, no server. Install and measure.

WHAT YOU CAN MEASURE

- Compass: heading and true north, sunrise and sunset times, altitude. Shows a calibration hint when accuracy drops

- Sound meter: live decibel meter in dB(A) with min, average and max, plus a reference chart

- Bubble level: three vials for X and Y at a glance, with the angle in numbers

- Ruler: calibrate the screen once and measure real lengths in cm, mm and inches

- Magnifier: camera magnifying glass with brightness, color inversion, freeze and save

- Protractor: measure angles against the screen, landscape mode

- Inclinometer: two-axis tilt for shelves, pipes and ramps

- Vibration meter: three-axis acceleration, explained in plain words

- Lux meter: light in lux and foot-candles, with recommended levels per room

KEEP YOUR READINGS

Save a measurement and find it again in the log.

Capture the screen and share it as is.

Turn on a sound or vibration alert when a reading passes your threshold.

BUILT FOR ACCURACY

- Tools that need a sensor your phone does not have are hidden, not broken

- A phone microphone is not a calibrated instrument. The app says so on screen

- Gauge needles are damped so they do not jump

- Every tool has a Help button with steps and a short glossary

GOOD FOR

- Leveling furniture and measuring small things around the house

- Putting a number on neighborhood or workplace noise

- Hiking and camping: heading, sunrise and sunset

- Reading small print

English and Korean, light and dark themes.

NOTES

- This app contains ads.

- Readings depend on your device sensors. Use professional equipment for safety-critical decisions.

PERMISSIONS

[Optional] Microphone: sound meter

[Optional] Camera: magnifier

[Optional] Location: true north, sunrise and sunset, altitude in the compass

Denying a permission only affects that tool. Change it any time in Settings > Apps > MeasureKit.