Measure

Turn your iPhone or iPad into a tape measure with Measure. Measure enables you to quickly gauge the size of real objects, like a person’s height, and it can automatically provide the dimensions of rectangular objects.
Features
• Draw lines and estimate their length in both horizontal and vertical dimensions.
• Automatically measure rectangular objects.
• Share measurements with friends via Mail, Messages and more.
On the iPhone 12 Pro and iPhone 12 Pro Max (and later), iPad Pro 11-inch (2nd generation and later), iPad Pro 12.9-inch (4th generation and later):
• Horizontal and vertical guide lines appear when measuring large objects for easier and more accurate measurements.
• Instantly measure a person’s height from the floor to the top of their head, hair or hat.
• Save measurements from a single session, complete with screenshots, so they’re easy to access and share whenever you need them.