1Level: Surface & Wall Level

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About this app

Level anything — a shelf, a table, a washing machine, a picture on the wall — with a level that's fast, accurate and actually fun to use.

AUTO SURFACE ↔ WALL
Lay your phone flat and you get a big bubble level. Press it against a wall or stand it on top of a picture frame and 1Level switches to a wall level by itself. The display locks to the edge you started on, so it never flips while you nudge a frame into place.

KNOW WHEN IT'S LEVEL — WITHOUT LOOKING
• Screen: the edges glow green and flash the moment you hit level
• Sound: a bright chime
• Buzz: a crisp vibration
• Audio guide: parking-sensor beeps that speed up as you get close, then a steady tone when you're dead level — perfect when the phone is above your head
• Haptic detents: feel a click every degree as you adjust
Each one can be switched on or off with a single tap.

CALIBRATION THAT JUST WORKS
Put the phone down on a flat surface — screen up or face down. It senses when it's still, counts down beep · beep · beep, and chimes "Level set". Pro mode uses the carpenter's reversal trick (measure, turn 180°, measure again) so it calibrates correctly even on a table that isn't level, and tells you how far off the table is.

FIVE INSTRUMENTS
• Surface — a liquid bubble vial with real physics
• Wall — a spirit-level tube with a laser line showing true horizontal
• Plumb — a swinging plumb bob for posts and door frames, plus wall lean
• Angle — a protractor with targets for 15°, 22.5°, 30°, 45°, 60° and 90°
• Auto — picks Surface or Wall for you

PLAIN-ENGLISH DIRECTIONS
Not just a number: "Right side is high · lower it", "Top leans left", "Bottom high 0.2°".

BUILT FOR REAL WORK
• Readings in degrees, percent, inches per foot (to 1/16″) and mm/m — all at once
• Adjustable tolerance from ±0.1° to ±1°
• HOLD freezes a reading; ZERO HERE measures relative to any existing slope
• Rock-steady when still, instant when moving
• Sunlight theme for working outdoors, plus Neon and Brass
• Screen stays on while you work
• Works on foldables and tablets

NO ADS. NO TRACKING. NO INTERNET.
1Level doesn't even ask for internet access. The only permission it uses is vibration.

What’s new

First release: Surface, Wall, Plumb and Angle levels, hands-free beep-beep-beep calibration, sound, vibration and screen-glow feedback, and an eyes-free audio guide.