A ruler and a level in one tool

Measure in millimetres and inches at once, check level and plumb on any edge, and read angles on screen. Calibrated to your phone.

Free · No account · Works offline

Ruler in mm and inches

Both scales on screen, fractions or decimals, and segments for things longer than your phone.

Bullseye when flat, tube vial on an edge. Degrees, percent grade, mm/m, in/ft or roof pitch.

Put the corner at the pivot, drag two arms, read the angle and its supplement.

Calibrate with a card or coin, then save readings with a label and share them as CSV.