Caliper: Level, Ruler & Angle

Caliper is a pocket precision toolbox — the measuring tools you reach for around the house, in one clean app. FOUR INSTRUMENTS • Bubble Level — 1-axis and surface. A real glycerin vial that turns true at 0.0°. • Ruler — an on-screen scale in mm, cm, or inches. • Angle Finder — a protractor and a tilt clinometer, with roof pitch and grade. • Sound — a quick decibel check of the room. GUIDED JOBS Do not just read a number — get the job done. Hang a Picture, Level a Shelf, Roof Pitch, Level Furniture: each walks you through it and saves the result. A MEASUREMENT LOG Keep every reading and group them into projects — the kitchen shelf, the living-room frames. PRECISION Calibrate the level and ruler with a fine tilt offset, and feel a firm haptic tick the moment a reading is true. HONEST BY DESIGN No ads. No tracking. No accounts. Everything is measured on your device and stays there — Caliper collects no data. Caliper Pro is a one-time purchase (never a subscription) that unlocks every Job, the unlimited log with projects, and precision calibration. The core instruments are free. Note: readings depend on your device sensors and are intended for everyday use, not certified measurement.