Ruler - Screen Measure Tool

Turn your smartphone screen into a precise ruler. Measure real lengths with a simple touch and drag.

【Key Features】
- Touch & drag to measure lengths instantly
- Switch between cm and inch units
- Real-time measurement display
- Automatic PPI detection for accurate results

【Precision Calibration】
- Credit card (85.6mm) calibration for pinpoint accuracy
- Saved calibration — set it once, measure anytime
- Optimized accuracy per device

【Easy-to-Use Design】
- Clean ruler interface with clear markings
- Dark mode support
- 10 languages supported
- Intuitive unit toggle

【Perfect For】
- Quick measurements when you don't have a ruler
- DIY, crafts, and sewing projects
- Furniture placement and space planning
- Students and professionals on the go

No need to carry a ruler — measure anything, anywhere with your phone!