Toolbox is a set of handy and elegant measuring tool kit. It turns your smart device into a swiss army knife that measure everything you will ever need. Currently, this carpenter tool box includes 14 metering tools: BAROMETER. Altimeter. Compass. DECIBEL (Sound Level Meter with dBA, dBC). TESLAMETER (Metal Detector). Metronome. Stopwatch. Timer. SEISMOMETER (Vibrometer).