Pocket Ruler

Pocket Ruler is an offline size reference app for checking and comparing common dimensions. Look up everyday objects, paper formats, screen sizes, photos, and luggage-style references, switch between cm, mm, and inches, and view comparison cards with dimensions and ratios.

The app works without an account, camera, files, internet, location, microphone, contacts, SMS, calendar, or broad storage permissions. It is a reference tool for comparing known dimensions, not a camera-based measuring tool.