Simple Ruler vs 量尺 Ruler

Simple Ruler is a practical measuring tool that turns your smartphone's screen into a ruler and protractor. Whenever you want to quickly measure something — in daily life, DIY, or crafts — you can start measuring right away, with no complicated steps. [Measuring Modes] - Simple mode: Just touch the screen to instantly see the distance from zero to that point. - Single-cursor mode: Slide one cursor to measure length precisely from the edge of an object. - Dual-cursor mode: Move two cursors freely and measure the width (gap) between them with precision. - Width x height mode: Measure vertically and horizontally at the same time and get an object's size (H x W) at a glance. - Protractor mode: Move two lines to measure tilts and angles. [Calibration for Accurate Measurement] Screen pixel density varies from device to device. To display an accurate scale, this app offers two calibration methods: - Using a real ruler: Hold a ruler against the screen and adjust the slider until the marks line up. - Using a card: Calibrate with a standard-sized card such as a credit card — no ruler needed. Once calibrated, your device works as an accurate ruler optimized for your screen. [Designed for Ease of Use] - Dark mode support: The app follows your device settings with an easy-to-read theme. - Works offline: No internet connection required. Launch and measure anywhere. - Privacy friendly: No access to your camera, location, contacts, or other personal data. [Multilingual] Available in English, Japanese, Korean, Chinese, Spanish, and many more languages. Make everyday measuring smarter.

Turn your phone screen into a real ruler — open it and start measuring. • No calibration: your device model is matched automatically • Four units side by side: cm, mm, inch, and cun • Input positioning: type a length and the ruler jumps to it • Draw to measure: draw any line and read its length instantly • Mini games: match-the-length and guess-the-length, solo or with friends • Two themes: hand-drawn and geek Fully offline. No ads. No data collected.