ARuler is a free iPhone application developed by Patrick Balestra. It falls under the category of Utilities & Tools and offers a convenient way to measure distances, areas, volumes, and even your height using augmented reality.

With ARuler, you can easily measure distances between two points by simply tapping on the start and end points. The app will then display the distance between the two points in real-time. Additionally, ARuler supports measuring areas and volumes, providing a versatile tool for various measurement needs.

One of the unique features of ARuler is the ability to measure your own height. You can choose to save your height measurements in the Health app, making it easy to track your progress over time.

ARuler also offers the option to save your measurements as pictures, allowing you to keep a record of your measurements for future reference. The app supports both metric and imperial units, as well as 10 different languages.

Please note that some advanced measurement modes and features are only available in the Pro version of ARuler.