Ruler vs Digital Level

Need to measure something right now and there's no ruler in sight? Your phone already has one. Ruler Toolkit turns your phone into a pocket measuring kit: a card-calibrated on-screen ruler, a protractor, a bubble level, a compass, camera measure and a handful of sensor tools — all in one lightweight, sign-up-free app that gets straight to the point. WHAT YOU GET On-screen ruler — measure in cm, mm or inches, with a 2-point mode and adjustable zero Real card calibration — fit a standard card (credit-card / ISO size) to the outline and correct your screen's true DPI, because every device is different Protractor — measure angles on screen with two arms, complement readout and automatic snapping to common angles Bubble level — surface mode (phone flat) and edge mode (long edge against the piece), with zero and hold Compass — find north with figure-8 calibration; keep the phone away from metal and magnets Camera measure — point at the floor or a wall and measure real-world distances in AR (needs an ARCore-certified device) Metal detector — spot ferrous metal by the change it makes in the magnetic field Light meter — read ambient light in lux, from dark to full sunlight Altimeter — set a zero point and read your relative height gain from barometric pressure Vibrometer — rest the phone on a surface and monitor its vibration Flashlight — instant screen light at a tap Saved measurements — keep lengths, angles and levels with a note ("shelf width"), filter, search and export 5 languages — English, Portuguese, Spanish, French and German CALIBRATE ONCE, TRUST IT AFTER An uncalibrated screen ruler is just a guess: the real size of a centimeter changes from device to device. Card calibration takes seconds — drag the handle until the outline matches a real card, and from then on your on-screen measurements reflect your actual screen. MADE FOR EVERYDAY JOBS Assembling furniture, hanging a picture, checking an angle, leveling a shelf, finding north at the campsite: the small measurements of daily life, solved without digging out the toolbox. AN HONEST NOTE ON SENSORS Some tools rely on hardware your phone may or may not have. The compass and metal detector need a magnetometer, the level and vibrometer use the accelerometer, the altimeter needs a barometer, the light meter needs an ambient-light sensor, and camera measure needs an ARCore-certified device. If a sensor is missing, that tool simply stays out of your way — the ruler, protractor and flashlight work on virtually any phone. SIMPLE AND PRIVATE No sign-up and no account required. Your saved measurements and calibration stay on your device; optional Google backup is there only if you want to restore on a new phone. Erase everything anytime in Settings. Keep a whole toolbox in your pocket — download Ruler Toolkit.

Free. No ads, no in-app purchases, no tracking. Digital Level turns your phone or tablet into a professional bubble level, inclinometer and angle meter. Hang a picture, mount a shelf, install an appliance, lay tiles, level a tripod or check a surface — accurate readings are always one tap away. WHY DIGITAL LEVEL • Realistic bubble level with smooth animation • Digital inclinometer with degrees and slope percentage • Horizontal, vertical and 360° modes • Manual calibration for maximum accuracy • Works fully offline, no unnecessary permissions • Clean, high-contrast UI readable on the job site • Automatic light and dark theme • Optimized for phones and tablets, portrait and landscape KEY FEATURES • 2D bubble level for flat surfaces (tables, floors, furniture) • 1D bubble level for horizontal and vertical lines (frames, shelves, doors) • Real-time angle and slope meter • Audio and visual feedback when the surface is perfectly level • Quick save of a reference position • Screen lock to read the value without moving the device USE CASES • DIY and home improvement • Masonry, carpentry and plumbing • Tiling, parquet and flooring • Mounting furniture, shelves, pictures and wall-mounted TVs • Installing washing machines, fridges and dishwashers • Aligning tripods, cameras and solar panels • Checking the slope of ramps, drains and roofs • Leveling RVs, caravans and boats ACCURACY & CALIBRATION Accuracy depends on your device's accelerometer. For best results, calibrate on a known flat surface — it takes a few seconds and Digital Level stores the correction for you. PRIVACY No account, no sign-up, no tracking. Digital Level does not collect personal data and works completely offline. Download Digital Level now and always carry a bubble level, an inclinometer and a protractor in your pocket — free and without intrusive ads.