LevelKit: Bubble Level & Angle

Hanging a shelf or a picture frame, leveling furniture, checking a slope? Just set your phone down. LevelKit measures level, slope, angles and direction in one app, and lets you calibrate for better accuracy. ■ Level · Lay the phone flat for a surface level (bubble, X and Y), stand it on an edge for a bar level — it switches automatically · Big 0.1° readout; turns green with a short vibration when within your tolerance · Hold to freeze the value, Save to keep it with a note ■ Two-step calibration · Measure once, turn the phone 180° and measure again — the surface tilt cancels out and only the sensor error is corrected · Calibration stays on your device and can be reset anytime ■ Slope & angle · Tilt shown as °, %, 1:n and rise per meter at the same time · Set a reference to measure the angle between two surfaces · Difference from a target angle (0, 15, 30, 45, 90°, ramp 1:12) · On-screen protractor: drag two arms to measure an object ■ Compass · Heading in degrees with 16 directions, lock a target bearing · Enter magnetic declination yourself to read true north (no location permission) · May be inaccurate near magnets or metal ■ History · Level, slope, two-surface, protractor and compass values with notes and time · Swipe to delete (with undo), export to CSV ■ Private by design · No location, camera or storage permissions, no sign-up, no server · Measurements and history stay on this device · Dark mode and large text support · No ads covering the measuring view, no ads on your first day · Remove ads with a one-time purchase (not a subscription) Note: Sensor accuracy varies by phone. For precise construction work, double-check with a professional level.

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