Smart Tool Box - Handy Carpenter Kit is a handy toolbox app with 40 smart carpenter and metering tools like bubble level, ruler, distance meter, DB meter, protractor, heart rate monitor (cardiograph), speed gun, magnetic field (metal detector), bar and QR code reader... Use device's in-built sensors in all in one tool box app, handy like a swiss army knife.

Carpenter tool list:
RulerRuler size can be calibrated;
Bubble levelCheck surface level. Bubble level can be calibrated;
LightUse it as a manual torch light, strobe light or a sound driven light show;
ProtractorMeasure the slope and angle of any object. Protractor can be calibrated;
Magnifier.
Metering tool list:
DB meterMeasure the sound DB level and its spectrum. DB meter can be calibrated;
Location (map);
Distance meterMeasure distance and height of different objects. Distance meter can be calibrated;
Speed gunMeasure speed of moving objects;
Stopwatch;
Thermometer;
Magnetic field (metal detector);
Vibration meterRichter scale based seismograph data;
Luminosity (Lux) meter;
Color sensor;
Heart rate monitor (cardiograph);
Speedometer;
Compass;
Battery tester;
Drag Racing.
Other handy tool list:
Unit and currency converter;
Calculator;
Code scannerScan R code and bar code;
NFC scanner;
Accelerometer;
Time zones;
Mirror;
Night vision;
Dog whistle;
Microphone;
Metronome;
Pitch tuner;
Counter;
Random generator;
Pedometer;
Body mass index;
Period tracker;
Translator;
Notepad.
The app supports all device brands (Samsung, Sony, HTC, LG, Huawei, Lenovo, Toshiba and others). However, not all models have the appropriate sensors to support all the tools. It is tested mostly on Samsung, Sony, HTC, LG, Huawei, Lenovo and Toshiba.