Ruler & Level - Plumbrule

Plumbrule puts a ruler, a bubble level, an inclinometer and a protractor in one clean, precise tool. It is named after the carpenter's plumb rule — a straightedge and a level in one board.

■ Ruler in millimetres and inches

• Metric scale on the left edge, inches (1/16) on the right — both at once

• Drag two lines to measure; the reading follows your finger

• Fractions (1/16, 1/32) or decimal inches

• Add segment: measure things longer than your screen and get the total

• Calibrate once with a bank card, a coin or any length you know, so the scale matches your screen exactly

■ Bubble level and inclinometer

• Lay the phone flat for a bullseye level with X and Y angles

• Stand it on an edge and it becomes a tube level — the vial and the reading turn with the phone

• Shows Level or Plumb, turns yellow and gives a short vibration the moment you are within tolerance

• Units: degrees, percent grade, mm per metre, inches per foot, roof pitch (x/12)

• Hold freezes the reading; Zero measures relative to any surface (great for matching an angle)

• Two-step flip calibration removes your phone's sensor offset

■ Protractor

• Put the corner at the pivot, drag both arms, read the angle and its supplement

■ Measurement log

• Save any reading with one tap, add a label, share as text or CSV

■ Built like a tool

• Graphite theme that is easy on the eyes, or a high-contrast Daylight theme for outdoors

• Keeps the screen on while you measure

• 31 languages

• No account, no sign-up. Your readings stay on your phone.

A small banner ad appears only on the Log and Settings screens — never over the ruler, level or protractor.

Accuracy depends on your phone's screen and sensors. Calibrate for best results and double-check critical work with a physical tool.

Privacy policy: https://tanzsoft.com/plumbrule/privacy.html

Questions or ideas: [email protected]