Simple Ruler: Tape Measure
Measure length, width & angles
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Measure length, width and angles with a touch. Calibrate with a real ruler or card for accuracy on any device. Works offline and is ready in an instant.
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.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
- Changed the App Store primary language to English
The developer, SATO TOMOMITUS, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Location
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- SATO TOMOMITUS
- Size
- 25.7 MB
- Category
- Utilities
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 12 more
- English, French, German, Hindi, Indonesian, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish, Traditional Chinese
- Age Rating
4+
- 4+
- Contains
Advertising
- Copyright
- © 2026 Ap Runner