RulerApp: True-Size Ruler

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 RulerApp works fully offline with no network access. One-time purchase, no ads.