A Step-by-Step Guide for Using the Measure App

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A Step-by-Step Guide for Using the Measure App
A Step-by-Step Guide for Using the Measure App

Apple’s Measure app is an often ignored built-in iOS app. The Measure app, which was released with iOS 12 in 2018, employs augmented reality (AR) to operate as a ruler to assess items in its surroundings.

We’ll show you how to use the app’s numerous functionalities to aid you with your measuring requirements in the sections below.

Accessing the Measure App

Apple devices come with the Measure app pre-installed. If you accidentally removed it, you may reinstall it for free from the App Store. Also, ensure that your device is up to date in order to take use of the most recent features.

The Measure app works on the following devices:

  • 7th generation iPod Touch or later iPad (5th generation or later)
  • Launch the Measure app. A popup will display on your device, instructing you to move it around until you see a circle with a dot in the middle.
  • Any iPad Pro
  • Any iPhone SE
  • iPhone 6S or later

How to Take Measurements With the Measure App

If you need to measure anything in real life, take out your iPhone and follow these instructions to utilize the Measure app:

  1. Position the dot above the beginning point of the item to be measured. Tap the addition (+) sign.
  2. As you move the cursor, a dotted line will develop from the beginning place. Move your smartphone to place the dot on the measurement’s endpoint. As you move the dot, you will see the measurement.
  3. Once positioned, touch the plus (+) button once again.
  4. After you take the measurement, the broken line between the dots will become a solid line. You may change the size of either of the dots by holding and moving them.
  5. After your first measurement, move your iPhone to find another beginning position. Then, touch the plus (+) button one more.
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You may change the measurement to centimeters or inches by tapping it. Select Copy to copy the measurement.

You may also use the shutter button in the bottom-right area to snap a screenshot of the item with the dimensions.

Related: How to Use Your iPhone’s Markup Feature

Keep in mind that you cannot use the shutter button until there is a firm line between the dots. If you still want to snap a picture, you may capture a conventional screenshot on your iPhone.

How to Take Multiple Measurements

You may take several measurements by combining fresh ones with old ones. Here’s how it’s done:

  1. Add another dot to an existing line or begin with one of the available dots. To add a dot to a line, just touch on it or anyplace on it.
  2. Adjust your gadget for another measurement.
  3. On an iPhone 12 Pro, iPhone 12 Pro Max, or iPad Pro, launch the Measure app.

If the measurements are not linked, the new ones will override the old ones. Previous measurements will not be retained.

How to Measure Rectangular Dimensions

Your iPhone identifies and inserts a measuring box around square or rectangular things automatically.

Tap the plus (+) button to view the object’s length and breadth. Its region should also be visible. If it doesn’t appear, shift your camera slightly. You may also press the region to view its size in other units.

Move your smartphone around to see whether the dots are properly positioned, and then manually adjust them if required.

LiDAR Scanner Features

Apple improved the Measure app even more by include a LiDAR scanner. The iPhone 12 Pro, iPhone 12 Pro Max, and iPad Pro now include light detection and ranging (LiDAR) capabilities (2020).

It’s the black dot on the rear of the gadget around the size of the flash.

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LiDAR, which is also used by self-driving vehicles, drones, robots, and professional photographers, transmits and receives light pulses to determine distances. It measures the depth and distance between the camera and its surroundings using time-of-flight (up to around 5 feet). This technology not only improves the speed and focus of iPhone cameras, but it has also significantly improved the Measure app’s functions. The app is quicker to use and the measurements are more precise.

Related: What Is Lidar and How Does It Work?

LiDAR-enabled devices include additional Measure capabilities, such as Ruler View, guidance, the ability to measure a person’s height, and measuring history.

To get an accurate measurement, go to a location with good illumination and ensure that a person’s face is plainly visible. When Measure finds a human, it will instantly begin measuring. It may be used to determine if a person is seated or standing.

How to Measure a Person’s Height

To measure a person’s height using the LiDAR scanner:

  1. Keep the subject in view of the camera and make sure their whole body is visible.
  2. Wait for a line to emerge on top of the person’s head, indicating their height.
  3. Press the shutter button to photograph the individual with their height. When you’re done, tap Done. Select between Save to Photos or Save to Files.
  4. Tap the shutter button to take a photo of the person with their height.
  5. Tap Done once you are finished. Choose between Save to Photos or Save to Files.

If your gadget is unable to identify the individual, try moving back a little. There will also be instructions on the screen to go farther away or closer.

To repeat the test, just focus the device somewhere else to reset the measurement.

Aside from the standard measuring tools, LiDAR devices provide a Ruler View that may be accessible when zooming in on a measurement.

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Ruler View

Simply move your smartphone closer to the measurement to see the ruler overlay over the line measurement, where you can view the object’s size in granular increments.

As you measure items, LiDAR devices will display additional vertical and horizontal guidelines. The sensor detects edges and displays guidelines to assist you in measuring them.


To begin measuring, just hit the addition (+) button anywhere on the guide. This function makes measuring items much simpler than tapping and moving your iPhone around manually.

In addition to guidelines and Ruler View, you can retrieve past measurements and screenshots taken during that measurement session by pressing on the list button in the top left corner of the screen.

Measurement History

This capability comes in handy when you need to measure a group of things. You may copy them, store them in Notes, or email them through Mail.

While certain measures may be a few millimeters off, measuring items using your iPhone is usually worth the modest accuracy sacrifice.

A Handy Ruler on Your Device

Thanks to technological advancements such as LiDAR and AR, you don’t have to break a sweat merely to receive an estimate of the size of an item. Sharing is also simple!

Thanks to technology enhancements like LiDAR and AR, you don’t have to break a sweat just to get a size estimation of objects. Sharing is effortless too!

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