iPhone Fourth of July Party Trick Everyone’s Talking About
Planning to spend this Fourth of July celebrating with friends and family? Here’s a cool iPhone trick that’ll surprise your guests and spark laughs all around. If you own a LiDAR-equipped iPhone, you can instantly measure a person’s height using Apple’s built-in Measure app. This unexpected but entertaining feature turns your phone into a clever party tool—perfect for backyard barbecues, fireworks-viewing hangouts, or any Independence Day gathering. Many iPhone users don’t even realize they have this capability in their pocket, and that’s why this fun trick is getting so much attention today. Ready to try it out? Let’s dive into how it works and how to use it effectively during your July 4th celebration.
How to Use the iPhone Fourth of July Party Trick
Using your iPhone to measure height is surprisingly simple and doesn't require any third-party app. It works seamlessly with the default Measure app, as long as your iPhone model has a built-in LiDAR Scanner. Here's how to pull it off and impress your friends:
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Open the Measure App on your iPhone.
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Make sure the person you want to measure is clearly visible from head to toe within your screen.
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Hold the phone steady and wait for a few seconds—Apple’s software will automatically detect the person’s height.
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A white line should appear at the top of their head or hat with the measurement displayed.
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If you want to capture the moment, tap the shutter button to take a photo, which includes both the person and their measured height.
This is a great way to compare heights at the party, see how much your nieces and nephews have grown, or call out that uncle who swears he’s 6 feet tall. It's all in good fun, and it often leads to some hilarious reactions.
Extra Tips for Better Results With This iPhone Trick
To get the most accurate measurements, there are a few useful tips and settings to keep in mind. The iPhone height measurement feature calculates the distance from the ground to the top of a person's head—or to the top of their hat if they’re wearing one. If someone is seated, it’ll adjust accordingly and show their seated height instead. For people using different units of measurement, you can switch between imperial (feet and inches) and metric (centimeters) by going to Settings > Measure > Measure Units.
If you’re measuring indoors, make sure the room is well-lit and the person is standing on a level surface. Outdoors, try to avoid strong backlight from the sun that might make it hard for the phone to clearly distinguish edges. The more contrast and clarity in the image, the better the results.
Which iPhones Support This Fourth of July Trick?
This fun feature is only available on iPhone models that include Apple’s LiDAR Scanner, which is designed to enhance depth sensing. It was first introduced in the iPhone 12 Pro and has been included in every Pro model since. Here’s the full list of compatible iPhones:
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iPhone 12 Pro
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iPhone 12 Pro Max
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iPhone 13 Pro
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iPhone 13 Pro Max
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iPhone 14 Pro
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iPhone 14 Pro Max
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iPhone 15 Pro
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iPhone 15 Pro Max
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iPhone 16 Pro
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iPhone 16 Pro Max
If your device isn’t on this list, unfortunately, the height measurement feature won't be available. However, you can still participate by taking the photos and letting friends with compatible phones handle the measuring.
Why This iPhone Fourth of July Trick Is a Conversation Starter
Beyond its novelty, this iPhone trick taps into the broader appeal of showing people what their devices can actually do. It’s one of those “hidden” features that feels a little bit magical when people see it in action for the first time. And since July 4th is a holiday often filled with food, family, and fun, this light-hearted party trick fits right in. Whether you’re measuring how tall your teen cousin has gotten or joking about who actually needs that extra inch on their dating profile, the reactions are always worth it.
So, before the grill heats up and the fireworks begin, pull out your iPhone and give this trick a go. It’s quick, fun, and a great way to get people talking—and laughing—at your Fourth of July bash.
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