6.4.5 Safe to install
Transform Your Smartphone into a Precision Measuring Tool

Ruler App: Camera Tape Measure offers an innovative solution for quick and accurate measurements using your smartphone's camera, making it an essential tool for DIY enthusiasts and professionals alike.
ARCore Ruler app - Powerful tape measure tool that leverages Augmented Reality technology.
Please note that the AR Ruler app is compatible only with ARCore-supported devices. Check device compatibility at this link.
The AR Ruler app utilizes augmented reality (AR) to measure real-world objects using your smartphone's camera. Simply aim at a detected plane and start using the AR tape measure tool:
- Line - for measuring linear sizes in cm, m, ft, yd; also supports mm and inch rulers.
- Distance meter - measure the distance from the device camera to a fixed point on the detected 3D plane.
- Angle - for measuring corners on 3D planes.
- Area and Perimeter.
- Volume - measure the size of 3D objects.
- Path - calculate the length of a path.
- Height - measure height relative to the recognized surface.
The Photo Ruler app is designed to accurately measure object sizes either by taking a picture or measuring on screen alongside traditional mm ruler or tape measure tools.
Ruler app is also available for iPhone at: this iTunes link.
How to use Ruler app:
Photo Ruler app:
- Ensure the object you want to measure and a known-length object (Base Item) are in the same picture.
- Select a Base Item, such as Debit/Credit card or Quarter, from the predefined list in the ruler app settings.
- Make sure that both the Base Item and the object to be measured using the Ruler app are in the same plane and parallel to the ruler app camera to avoid image distortions caused by perspective.
- Align the Blue arrows with the Base Item and Green arrows with the object to be measured. The measurement will display on the Ruler app screen.
Ordinary mm ruler app:
- Use your screen as a traditional mm ruler. Place a small object on the device screen and adjust the line limiters against it.
- If you notice visual distortions, reset the mm ruler app calibration manually. Calibration can be done using different Base Items like Debit/Credit cards or coins. Choose between Imperial (inches) and Metric mm ruler (centimeters).
Accuracy of mm ruler app:
If markers are aligned correctly, measurements will be as precise as with traditional tools such as an mm ruler or tape measure.
Overview
Ruler App: Camera Tape Measure is a Freeware software in the category System Utilities developed by Grymala apps.
The latest version of Ruler App: Camera Tape Measure is 6.4.5, released on 04/20/2025. It was initially added to our database on 02/20/2024.
Ruler App: Camera Tape Measure runs on the following operating systems: Android.
Users of Ruler App: Camera Tape Measure gave it a rating of 4 out of 5 stars.
Pros
- Easy to use interface that mimics a physical tape measure
- Utilizes the device's camera for accurate measurements
- Supports multiple measurement units (metric and imperial)
- Allows users to save and share measurements
- Offers a clear visual representation of measurements on-screen
- Lightweight application that does not take up much storage space
- Regular updates with new features and improvements
Cons
- Dependent on good lighting conditions for accurate measurements
- Requires initial calibration which can be confusing for some users
- Limited to simple measurements; may not suit all construction needs
- Accuracy can be affected by the distance from the object being measured
- May struggle with irregularly shaped objects or non-rectangular surfaces
- Some users report occasional software bugs or crashes
- Not a substitute for professional measuring tools in precision-heavy tasks

Boris Weber
I am an editor at UpdateStar. I started as a support engineer, and am now specialized in writing about general software topics from a usability and performance angle among others. I telecommute from UpdateStar’s Berlin office, when I am not working remote as a digital nomad for UpdateStar. When I'm not analyzing the latest software updates, you can find me exploring new cities, immersing myself in local cultures, and discovering innovative tech trends across the globe.
Latest Reviews by Boris Weber
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