
On-Screen Ruler & Tape Measure
Calibrated cm & inch scale
0 ratings
Free
About
Turn your iPhone into a precise on-screen ruler and digital tape measure. Set a small object on the screen and read its size in centimeters or inches — no camera, no internet, no clutter.
Measure everyday things in seconds: screws, coins, cables, keys, jewelry and anything that fits on your display. Calibrate once against a card or coin for reliable readings on any device.
WHAT YOU CAN DO
• On-screen ruler in centimeters, inches and millimeters
• Digital tape measure — drag two points to read any length
• Protractor for angles and a bubble level for checking surfaces
• Length unit converter plus a size reference for common objects
• Save measurements to history and reuse them anytime
HOW IT WORKS
1. Calibrate the screen once against a real object
2. Choose your unit and place the item on the display
3. Read the size and tap save to keep it
Every measurement stays on your device. No accounts, no ads, no tracking — just a fast, focused measuring toolkit in your pocket.
Note: the on-screen ruler is calibrated per device and gives close, approximate readings, ideal for quick everyday sizing.
Full access unlocks with a subscription, offered weekly, yearly, or as a one-time lifetime purchase.
Terms of Use: https://web-levi.web.app/terms
Privacy Policy: https://web-levi.web.app/privacy-policy
Questions? tphuc.work@gmail.com
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What's New in On
1.1.0
July 25, 2026
Introducing Premium with new features. Plus bug fixes and improvements.









