Just a Toolbox

Just a Toolbox puts the everyday and measuring tools you reach for in your pocket: a ruler, a bubble level, a flashlight, a QR code scanner, a voice recorder with notes and photos, a sound meter, a compass, a stopwatch and timer, a metronome, a scientific calculator and more. Every tool has a short "how to use" guide, one tap away. Measure anything. Trust the number. Each measuring tool shows a badge (EXACT, HIGH, MEDIUM or APPROXIMATE) that tells you honestly how far its reading can be trusted on a phone, based on published studies and standards. EVERYDAY TOOLS • Flashlight: a bright torch with brightness control, strobe light, SOS signal and an auto-off timer. Phones without a flash get a screen light. • Voice notes and voice recorder: write quick notes or meeting notes, record voice memos and add photos, all saved in one note, like a reporter's notebook. Tap MARK while recording to stamp the time of an important moment, then jump straight back to it. Search, pin and sort notes by category. • QR code scanner and generator: scan QR codes and barcodes, open links, copy text, or create your own QR code for a website, Wi-Fi network, contact or text. • Calculator: a simple calculator and a scientific calculator (sin, cos, tan, log, powers, roots, factorial) with history. • Stopwatch, timer and Pomodoro: a lap stopwatch to the hundredth of a second, a countdown timer with alarm, and a Pomodoro focus timer for work and study. MEASURE • Ruler: a true-size ruler in centimetres, millimetres and inches for when there's no tape measure around, worked out from your screen. Calibrate it with a bank card for ±0.3 mm. • Bubble level: a spirit level and inclinometer for shelves, frames and pictures. Use it upright, sideways or flat as a bullseye level, with a calibration that cancels your phone's own error. About ±0.2°. • Protractor and angle finder: measure angles and slopes, use a plumb line, or find the angle between two surfaces. • Bolt and drill gauge: true-size circles for M2 to M12 bolts, screws and drill bits, with thread pitch, tap drill, clearance hole, spanner and hex key sizes from the ISO standards. SOUND • Sound meter: a decibel meter (dB) to check how loud it is, with the A-weighting real noise meters use, LEQ, min and max. Calibrate it against a real meter. • Frequency analyzer and tuner: the pitch of any steady note in Hz, the musical note and cents, to tune a guitar or other instrument. • Tone generator: pure test tones from 20 Hz to 20 kHz. • Metronome: a steady beat from 30 to 250 BPM with tap tempo, time signatures, accents and subdivisions, timed by the phone's audio clock so the beat stays steady. SENSORS • Compass with true north and magnetic field strength. • Metal detector: finds iron and steel, such as nails and screws near the surface of a wall. • Light meter: brightness in lux for rooms, desks and plants. • Barometer and altimeter: air pressure and height change. • Vibration meter: frequency and strength of a vibration. • GPS speedometer: speed, top speed and distance. CALCULATE • Unit converter: length, area, volume, weight, temperature, pressure, torque and more, with exact factors. • Ohm's law calculator for volts, amps, ohms and watts. • Resistor color code calculator for 4, 5 and 6 bands. Tap the heart on any tool to keep it at the top, and add tools to your home screen as widgets, including a stopwatch that runs right on the home screen. Private by design: your notes, recordings and measurements stay on your phone. The microphone, camera, location and sensors are used only while their tool is open. Free, with a few gentle ads that never appear on tool screens. Pay once to remove them and support new tools. with ♥ by justdataplease.com

Built with the latest Android tools.