About this app
RulerApp turns your iPhone or iPad screen into a true-to-size ruler, so you can measure everyday objects without hunting for a tape measure. Features: - On-screen ruler at true scale (cm/inch, down to 1mm or 1/16 inch) - Accurate sizing using your device's actual PPI - Works in portrait and landscape (landscape measures farther) - Drag start/end markers to auto-calculate the distance between two points - Quick calibration using a standard credit card (85.6mm) - Built-in cm / inch / mm unit converter Great for: - Quick measurements when you don't have a tape measure - DIY projects - Designers checking print dimensions - Students measuring for science experiments Measurements are processed on your device. FREE VERSION AND FULL ACCESS The free version displays banner ads. A one-time Full Access purchase unlocks every feature and removes ads. Customers who previously bought the paid app also continue without ads.
Latest release
What’s New
Added a freemium option with ads in the free version. Paid pricing remains unchanged.
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Sep 4, 2026 · 5:20 AM Free
Screenshots
