Meet the largest iOS toolbox kit with 31 carpenter, construction and other tools and gauges like bubble level (spirit level), laser level, stud finder, dB meter, protractor (angle meter)... Use device's in-built sensors in all in one toolbox app, handy like a Swiss army knife.

Carpenter and construction toolbox:
Ruler;
Bubble level (Spirit level);
Laser level;
Light: Manual torch light, strobe light, light show;
Protractor (angle meter) with plumb bob;
Magnifier.

Gauges toolbox:
dB meter with frequency spectrum;
Distance and height meter;
Speed gun (speed meter);
Stopwatch;
Metal detector (stud finder);
Vibration meter;
Luminosity meter;
Color sensor;
Cardiograph (heart rate meter);
Speedometer.

Other handy tool kit:
Unit converter: Also includes currency converter;
Code reader: QR code and bar code;
Accelerometer;
Night vision;
Dog whistle;
Metronome;
Pitch tuner;
Counter;
Random generator;
Pedometer;
Body mass index;
Period tracker;
Translator.

Free kit with advertisement, optional removal with paid upgrade.