Smart Phone Sensor Checker

Before you build an app or a device, check whether the phone can actually produce the signals it will depend on.

A spec sheet may list a sensor, but whether it reports values, how often, and how accurately varies from handset to handset. Sensor Checker shows you.

■ Two ways to use it

Situations - pick one of ten situations (on a boat, coastal walking, work at height and more) and the required sensors and sampling rate are set for you. You see at a glance whether this phone is enough for an app built around that situation.

Single sensor - turn on any of 18 sensors one at a time and watch its value and waveform. Nothing is recorded, so you can explore freely.

■ Display that fits the sensor

Heading appears as a compass, tilt as a spirit level, cellular strength as signal bars, position on a map. Not just rows of numbers.

■ Signals you can check

Location - latitude/longitude, altitude, accuracy, speed, satellite count
Cellular - signal strength (dBm), bar level
Motion - acceleration, linear acceleration, gravity, gyroscope
Attitude - heading, pitch and roll, magnetometer
Environment - barometric pressure, relative altitude, light, proximity

■ Export to Excel

Save a session as an xlsx file. Alongside the raw values it includes a sheet explaining every column, its unit, and the grading thresholds, so whoever receives it can read it without asking you.

■ Your data never leaves the device

Measurements are stored only on this phone. Nothing is uploaded. No accounts, no ads, no analytics SDKs.

■ Four languages

Korean, English, Chinese and Japanese. Switch any time inside the app; the Excel export follows the language you chose.

■ Not a safety device

This app does not detect or report accidents. It is a development and evaluation tool for checking what signals a handset can produce. Do not rely on it where safety is at stake.