Libella: Measure Everything

Libella — Measure Everything 📏

Turn your phone into a complete, pocket-sized measuring toolkit. Nine precise tools in one clean, easy-to-use app — whether you're hanging a picture, fitting furniture, checking a room's brightness, gauging how loud a space is, measuring a floor, or working out which paint matches your wall.

🫧 Bubble Level (Spirit Level & Inclinometer)

A professional bubble level for perfectly flat and plumb surfaces. Rest any edge of your phone on a surface and read the tilt instantly, down to a tenth of a degree. Perfect for DIY, carpentry, shelves, frames, and appliances. Haptic and optional sound feedback tell you the moment you hit level.

🎯 Distance Meter (AR Range Finder)

Point your camera at a wall, floor, or object, tap, and instantly read how far it is from your phone using augmented reality. A quick range finder for spacing, layout, and "how far is that?" moments.

📐 Angle Finder (Camera Protractor)

Measure any angle in seconds using your camera. Align the on-screen protractor arms and read the angle — no math, no guesswork. A digital protractor for woodworking, construction, and crafts. Freeze the frame to fine-tune without shake.

📏 AR Ruler (Tape Measure)

Measure real-world distances between two points using augmented reality. When a tape measure won't reach, stretch a line straight through the air and read corner-to-corner. Ideal for furniture, rooms, and quick estimates.

💡 Light Meter (Lux)

Measure the ambient light level around you in lux, with a live reading and min / average / max. Great for setting up a workspace, comparing room brightness, plants, or photography lighting.

🔊 Noise Meter (Sound Level)

Estimate the sound level around you in decibels with a live meter, min / average / max, and start/stop control. Includes manual calibration so you can dial it in for your device. Handy for a noisy room, an office, or a quiet space.

📳 Vibration Meter (Motion Sensor)

Read vibration on an analogue dial and as a live number in m/s², with min / average / max, a peak marker, and an approximate dominant frequency in Hz and RPM. Handy for a running machine, an appliance, a fan, a table, or any surface that shakes.

🧭 Area Meter (AR)

Measure the area of a floor or surface in AR. Aim and tap each corner of the shape, then press Done to close it and read the area in m². Great for rooms, floors, walls, and irregular shapes a tape measure can't handle easily.

🎨 Paint Colour Meter (RAL Finder)

Point the square at a wall, a car panel, furniture, or any surface and read its colour: hex, RGB, and the closest shade from the RAL CLASSIC collection of 216 colours. Freeze the frame to read it comfortably, and switch on the light for dark corners. Ideal for buying matching paint, identifying a wall colour, finding the RAL code of a car body panel, or checking that two surfaces really match. Matching runs in CIELAB rather than raw RGB, and the app tells you how close the match is.

Why Libella?

✔️ Nine precise measuring tools in one app

✔️ Clean, modern, easy-to-use design

✔️ Bubble level is completely free

✔️ Just point, tap, and measure

✔️ No clutter, no learning curve

✔️ No ads getting in your way

Libella Pro

Unlock all eight Pro tools with a single one-time purchase — no subscription. The bubble level stays free forever.

Note on accuracy: Libella gives fast, practical readings for everyday tasks. Results depend on your device's sensors, camera, microphone, lighting, and how steadily you hold the phone. The AR tools need an ARCore-supported device and work best when you move the phone slightly to build depth. The Light, Noise, and Vibration meters are uncalibrated estimates — the noise meter offers manual calibration. A phone camera is not a colorimeter, so treat the RAL match as a strong starting point, not a replacement for a physical RAL fan deck. For critical or professional work, always confirm with a dedicated instrument.