Levelo: Spirit Level & Angle

Levelo turns your phone into a spirit level you can actually trust — calibrated, filtered and steady. Fully offline, with no account and no sign-up.

Built for builders, joiners, tilers, roofers, shelf-hangers and anyone who hangs, levels or slopes things for a living.

WHAT YOU CAN DO

• Two-axis bubble level — a bullseye for flat surfaces, with X, Y and total tilt
• Surface check — a single-axis vial for an edge, with a tolerance you set
• Angle finder — a live protractor with the angle, slope, ratio and roof pitch at once
• Fall per metre — the number you actually need when setting a drainage run
• Slope calculator — enter rise and run and get the angle, or go the other way
• Pitch converter — degrees, percent, ratio, n/12 pitch and radians, all live
• Reference tables — roof pitches, ramp gradients and pipe falls, offline
• Proper calibration — the 180° rotation method, so a sloped table cannot fool it
• Save and share — keep readings with notes and send them as plain text

ACCURACY
Levelo reads your phone's accelerometer. Accuracy depends on the device and on calibrating it first — it is an indicative tool, not a certified instrument. Do not use for certified structural surveying.

PRIVACY FIRST
Levelo collects no personal data. There is no account, no server and no internet connection required. The app requests zero Android permissions.

Download Levelo and stop squinting at a bubble that never settles.