Features
Six measuring tools built on your phone's own sensors, no network required.
Bubble level (flagship tool)
Flat mode (phone lying on a surface, target moves on both axes) and edge mode (phone held against a vertical or horizontal edge, linear bubble) with automatic switching based on accelerometer data. Shows degrees, % slope, and mm/m at once. Two-step calibration (measure, then flip 180° in place) removes mounting error, with hold/freeze and an audio "строй-laser" mode that ticks faster near 0°.
Compass
Tilt-compensated magnetic north, calculated from the accelerometer and magnetometer together.
Altimeter
Barometric altitude with a known-elevation calibration (not GPS, to stay offline), plus a pressure trend indicator.
Metal detector
A bonus tool built on the same magnetometer as the compass — shows deviation from a background field you calibrate yourself. A fun extra, not a precision instrument.
Lux meter
Ambient light level in lux, with no calibration step required.
Ruler
Calibrated against a standard bank card (85.6mm, ISO/IEC 7810 ID-1) rather than the device's reported screen DPI, for a more accurate result.
Measurement log
A single log shared across all six tools — save a reading with a text note, browse the list, delete what you don't need.