No Trial or free version.
You will be asked to pay once you download the app. There is no free tool that use can use. Not even once.
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About
This app transforms your phone into a precise measuring tool. Calibrate it once with a common object to accurately measure small items, angles, and levels. It also includes a unit converter and a tape canvas for larger measurements.
✓Calibrated on-screen ruler
✓Protractor with set square
✓Bubble level
✓Unit converter
✓Tape canvas for length and area
✓Saved history for measurements
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What's New in Ruler
1.1.1
August 15, 2026
Bug fixes and performance improvements.
User reviews
Developer apps
FAQ
How accurate is Ruler?
Ruler provides calibrated approximations for fast everyday sizing. Accuracy is enhanced by calibrating the scale against a real card or coin once. Readings are not intended for machining tolerances.
Does Ruler have ads?
No, Ruler does not have ads. The developer explicitly states that there are no ads, and all measurements and data stay on the device.
What devices does Ruler support?
Ruler is currently supported on iPhones. The app utilizes the device's motion sensors for features like the bubble level.
How do I calibrate Ruler?
Calibration involves placing a bank card or coin on the screen and following the on-screen instructions. This process takes under a minute and ensures accurate measurements for all tools within the app.
Can I use Ruler offline?
Yes, Ruler is designed to work entirely offline on the device. It does not require a camera, account, or internet connection to function.
What is the age rating for Ruler?
Ruler has an age rating of 4+. This indicates it is suitable for children and adults, with no mature content.
How often is Ruler updated?
The latest version is 1.1.1, last updated on August 15, 2026. While specific update frequency isn't detailed, this indicates active development.
What are the full access options for Ruler?
Full access unlocks all tools without limits, including the calibrated ruler, tape canvas, protractor, bubble level, and unit converter. This is offered via weekly subscription, yearly subscription, or a one-time lifetime purchase.
