You might know that your iPhone has a built-in Level you can use to straighten pictures or shelves, but did you know that it also has an app called Measure that uses Augmented Reality to help you measure distances? Here’s what you need to do:

1. Tap the Measure app to open it.
2. Position your iPhone camera so that it’s facing a flat surface.
3. Tap the + icon to start measuring.
4. Move the iPhone so that the on-screen measure also moves.
5. When you’ve measured the space, tap the + again to show the measured distance.