# Sensor Toolkit: Lux, dB, Level > Light meter, sound meter, compass, bubble level, ruler and flashlight in one. Canonical page: [https://chrome-stats.com/d/com.ninetyniners.sensor\_toolkit](https://chrome-stats.com/d/com.ninetyniners.sensor_toolkit) ## Overview - **ID:** `com.ninetyniners.sensor_toolkit` - **Platform:** Android - **Type:** Android app - **Status:** Available - **Publisher:** 99ersstudio - **Category:** PRODUCTIVITY - **Downloads:** 3 - **Version:** 1.0.0 - **Last updated:** 2026-10-18 - **First published:** 2026-10-17 - **Publisher country:** US - **Size:** 22 MB - **Data as of:** 2026-11-07 - **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.ninetyniners.sensor_toolkit) - **Website:** [https://99ersstudio.com](https://99ersstudio.com/) - **Privacy policy:** [https://99ersstudio-policies.pages.dev/sensor-toolkit/](https://99ersstudio-policies.pages.dev/sensor-toolkit/) ## Description Sensor Toolkit puts five everyday measuring tools on your phone, each built on a sensor the phone already has. Open the app, tap a tile, and the tool is ready. No account, no sign-up, and nothing your sensors read ever leaves the phone.

LIGHT METER
• Live illuminance in lux on a gauge from 1 to 100,000 lux
• Brightness band at a glance: Dark, Dim, Indoor, Bright, Daylight, Direct sun
• Exposure Value (EV) with selectable ISO 100 to 1600, for photo and video
• Min, average and max of the session, plus a reference table of typical lux values

SOUND METER
• Live noise level in decibels with min, average and max
• Level band from Quiet to Dangerous
• The microphone is used only while you measure. Nothing is recorded or saved.

COMPASS + LEVEL
• Compass with heading in degrees and cardinal direction, tilt compensated
• Bubble level with the tilt of both axes in degrees
• One tap switches between the two

SCREEN RULER
• Measure small objects directly on the screen, in centimetres or inches
• Uses the real pixel density of your display, with a one-time calibration against a card or coin for exact results

FLASHLIGHT + SOS
• Torch on and off with one large button
• SOS light signal in Morse code
• Brightness control on phones that support torch brightness (Android 13 and later)

MADE TO BE USED
• Light and dark theme, following your system setting or your own choice
• 20 languages
• Works on phones and tablets
• A sensor your device does not have is named clearly instead of showing a dead screen

HONEST SCOPE
These tools read your phone's built-in sensors, so they are handy references, not calibrated instruments. The sound meter shows an approximate level, not a certified sound pressure reading. The compass depends on your phone's magnetometer and on metal and magnets nearby. Accuracy varies between devices. The SOS signal is a light pattern only; the app does not call or message anyone.

PERMISSIONS
• Microphone: asked the first time you tap Start in the sound meter, and only there. Every other tool works without it.
• No camera permission, no location, no contacts, no storage access.

PRICE
Free, with one small banner ad at the bottom of the screen. No full-screen ads, no subscription. ## Rankings - #3,093,757 — Overall ## Permissions and access ### Permissions - `android.permission.ACCESS_ADSERVICES_AD_ID` - `android.permission.ACCESS_ADSERVICES_ATTRIBUTION` - `android.permission.ACCESS_ADSERVICES_TOPICS` - `android.permission.ACCESS_NETWORK_STATE` - `android.permission.FOREGROUND_SERVICE` - `android.permission.INTERNET` - `android.permission.RECORD_AUDIO` - `android.permission.WAKE_LOCK` - `com.android.vending.BILLING` - `com.android.vending.CHECK_LICENSE` - `com.google.android.gms.permission.AD_ID` - `com.ninetyniners.sensor_toolkit.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION` ## Similar extensions and apps - [Compass, Sound Meter & Level](https://chrome-stats.com/d/com.eltacrew.measurekit) — 41 users - [Smart Toolkit: Compass, Level](https://chrome-stats.com/d/com.sensorhub.app) — 15 users - [Sensor Toolkit](https://chrome-stats.com/d/app.hangik.sensortoolkit) — 61 users - [Measure Toolbox: Compass Level](https://chrome-stats.com/d/tech.licheng.measure) — 44 users - [Smart Toolbox](https://chrome-stats.com/d/net.xavvy.smart.toolbox) — 97 users - [Toolkit: Ruler, Level, Compass](https://chrome-stats.com/d/com.astroforged.app.toolkit) — 4 users - [Smart Tools Kit: Level, Ruler](https://chrome-stats.com/d/com.pentarab.tools) — 4 users - [Bubble Level - Sensory Tool](https://chrome-stats.com/d/com.tools.bubblelevel) — 9 users - [Pocket Sense: Sensor Toolbox](https://chrome-stats.com/d/app.pocketsense.tools) — 6 users - [PocketMeasure: Ruler & Level](https://chrome-stats.com/d/com.lightingtechbj.pocketmeasure) — 93 users - [Sensor Toolkit](https://chrome-stats.com/d/com.imbtechstudio.sensors) — 23 users - [SensorKit](https://chrome-stats.com/d/com.fnati.sensorkit) — 7 users --- Source: [Chrome-Stats](https://chrome-stats.com/d/com.ninetyniners.sensor_toolkit)