Instructions apply to iPhones running iOS 12 and iOS 11 except as noted.
To aid the calibration process, follow the onscreen animation.
After the equipment is calibrated, the compass screen displays.
MirageC / Getty Images & Bianca Van Dijk / Pixabay
Understand the Compass
Hold the iPhone parallel to the ground with the screen facing up.
At the center of the compass is a small circle with a crosshair in the center.
A small red arrow, situated above the letter N, points north.
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Compass directions are typically expressed in degrees.
The current degree the iPhone is facing updates as you rotate the equipment.
The app also showcases letters indicating the four cardinal directions.
Chris Ryan / Getty Images
Adjust your path to return to the chosen course.
To dismiss the arc, tap the center of the compass once more.
This information is not available in all areas.
To use it, bring up the Measure app, then tapLevel.
Calibrate the Level
Calibrate the app with a point that is flush.
The digital level indicates how far off the item is from being perfectly aligned with the original surface.
This tells the gadget you are working on a vertical axis.
You’ll see an indication of how far off level the phone is.
Adjust the phone’s position until the gear is in a level position, then tap the screen.
The level turns green and displays the number 0.
Your iPhone’s level function is now calibrated.
Recalibrate the level each time you switch axes or align something differently.
Rotate the object left or right while keeping the iPhone pressed against it.
Adjust the object and the iPhone until the number0displays on the screen which indicates it is level.
Continue to rotate the object and phone in the appropriate direction to bring the number back to zero.
