The iPhone Measure level offers a quick way to check the angle of a small object. It is useful when a tabletop picture frame looks slightly tilted, but the result is approximate. Start with an object you can adjust easily and keep the phone supported throughout the check.
Open the level
- Open Measure, which may be in the Utilities folder.
- Tap Level.
- Hold the iPhone against the object you want to check.
- Adjust the object and phone together until the display turns green.
Choose a straight contact edge and avoid letting the phone rock while you read the display. A moving hand can make it harder to judge whether your adjustment helped. Place the frame somewhere accessible so you can work without reaching awkwardly.
Compare two slopes
Hold the iPhone against the first surface and tap the screen to capture its slope. Move to the second object and adjust it until the display turns green. Tap again to clear that reference when you finish.
Before comparing, decide what you are matching: the top edge of two frames, for example. Using different edges can make the comparison confusing even when the screen looks reassuring.
Keep the result in context
Try a small adjustment, step back, and look at the object in its surroundings. A phone check is convenient for everyday positioning; use equipment appropriate to the job when a precise measurement matters.
Afterward, close Measure and put the phone somewhere stable before moving the object again. There is no benefit in balancing a device on a narrow edge just to keep the reading visible.
Official reference: Read the official instructions.
Featured image: conceptual illustration, not a device screenshot.