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Fix for older Android phones On phones running Android 7.0 or 7.1 the app closed by itself as soon as it opened. That is fixed. Nothing else has changed.
Compass, spirit level, sound meter & 9 more sensor tools — offline, all-in-one
An all-in-one sensor toolbox: compass, spirit level, sound meter, metal detector, GPS speedometer, ruler, unit converter, magnifier, altimeter, barometer, light meter and more — 15 precision instruments in one utility app. Every sensor tool works offline, without internet or Wi-Fi, and there is no sign-up. One smart toolbox instead of a dozen single-tool downloads. 🧭 COMPASS Smart digital compass with heading, pitch and roll. True north, azimuth and live calibration for pinpoint direction finding — perfect for hiking, navigation and outdoor adventures. 📐 SPIRIT LEVEL Bubble level for horizontal and vertical surfaces. Check shelves, frames, tables and DIY projects with precision — a precise bubble level, inclinometer and protractor in your pocket, with angle readout in degrees. 🔊 SOUND METER (dB) Real-time decibel meter with session average, peak and noise-safety zones. A professional sound level meter to track noise around you and protect your hearing. 🔍 METAL DETECTOR Magnetic field detector and stud finder with a live magnetic intensity graph. Find hidden metal objects, stud-sniff behind walls, and verify magnetometer readings in µT. 🚗 GPS SPEEDOMETER Digital GPS speedometer and odometer. Track current, average and max speed, plus total distance travelled — great for driving, cycling, running or e-scooters. 👣 PEDOMETER Step counter with distance, calories and active time. Set daily goals and see your walking pace outlook at a glance. 🔦 FLASHLIGHT More than a torch. Bright LED flashlight, SOS emergency signal, strobe mode with adjustable speed, and soft screen light for ambient illumination. 🔎 MAGNIFIER Camera-based digital magnifier with zoom, freeze frame and flashlight — read fine print, labels and tiny electronics without strain. ⛰️ ALTIMETER GPS altimeter shows elevation above sea level — useful for trekking, cycling, flights and weather tracking. 🌡️ BAROMETER Live atmospheric pressure sensor in hPa with trend history — a practical weather tool for outdoor planning. 💡 LIGHT METER (LUX) Ambient light sensor reading in lux — ideal for photography, study desks, plant care and workspace setup. 📳 VIBRATION METER Accelerometer vibration analysis with live graph — handy for DIY, auto diagnostics and earthquake curiosity. 📏 RULER On-screen ruler in millimetres and inches, with a numbered scale that starts right at the edge of the screen. Tap to mark a point, and drag to scroll the scale for anything longer than the screen. 🔄 UNIT CONVERTER Length, weight, speed, area, volume, pressure and temperature. Exact fixed factors, so it works fully offline and never goes stale. 🌡️ THERMOMETER Ambient temperature from your phone's built-in temperature sensor, in °C or °F. Only a few phones ship this sensor — if yours doesn't, the app says so rather than showing a battery reading dressed up as room temperature. ✨ WHY THIS TOOLBOX? ✔ 15 professional tools in one all-in-one toolbox ✔ Clean, modern Material You interface — no learning curve ✔ Real-time readings with live graphs, peaks and history ✔ Calibration support for compass, level, metal and vibration ✔ Works 100% offline — no internet needed ✔ Lightweight, battery-friendly, zero clutter ✔ No sign-up and no account — open it and start measuring Whether you're a DIY enthusiast, outdoor adventurer, student, engineer or just someone who loves a good utility app — this toolbox gives you the right instrument for every situation. Replace a dozen single-tool apps with one beautiful smart toolbox. Download Compass Level & Sound Meter now and carry a full sensor toolkit in your pocket!