Simple Ruler: Measure, Tape

"Simple Ruler" is a practical, precision-focused measurement tool that turns your smartphone screen into a ruler or protractor.

Whether for daily life, DIY projects, or crafts, when you need to quickly measure a length, this app lets you do it instantly without any complex operations.

【Key Measurement Modes】
・Simple Mode: Simply touch the screen to quickly check the distance from the zero point to that exact spot.
・One-Side Mode: Slide a single cursor to perfectly measure lengths from the edge of an object.
・Two-Side Mode: Freely adjust two cursors to precisely measure the "gap (width)" between them.
・2D Mode (Length & Width): Measure both vertical and horizontal directions simultaneously to capture an object's size (W x H) all at once.
・Protractor Mode: Adjust two lines to easily measure slopes, inclines, and angles.

【Calibration Features for Precise Accuracy】
Smartphone screen sizes and pixel densities (DPI) vary by model. To ensure the screen displays a perfectly accurate scale, this app offers two easy calibration methods:
1. Using a Real Ruler: Place a physical ruler against your screen and move the slider to match the markings perfectly.
2. Using a Card: Use any standard card, such as a credit card, to calibrate even when you don't have a ruler handy.
Once set, the app is fully optimized for your specific device, serving as a highly accurate digital ruler.

【Designed for Pure Usability】
・Dark Mode Support: Automatically switches to a highly readable, eye-friendly theme based on your device settings.
・Offline Functionality: No internet connection required. Launch and use it anytime, anywhere.
・No Permissions Needed: We respect your privacy. The app never accesses personal data like your camera, location, or contacts.

【Multilingual Support】
This app supports many languages, including English, as well as Spanish, French, and German.

Make everyday measuring smarter.