How to Calibrate an iPhone Screen

By Nolen Gertz

A guide to calibrating an Apple iPhone screen's touch sensitivity and the screen's level of brightness.

You can't calibrate the sensitivity of the iPhone touch screen but you can calibrate the motion sensors and the screen brightness.

Calibrating the Motion Sensors

Your iPhone's motion sensors can be affected by close proximity to a magnet or by environmental factors. When this happens, the iPhone notifies you to use the iPhone's Compass app to recalibrate all the motion sensors, including the gyro, magnetometer and accelerometer.

Step 1

Tap the Compass app on the iPhone screen.

Step 2

Magnetic interference affects the motion sensor accuracy, making occasional recalibration necessary.

Follow the on-screen prompt to tilt the iPhone screen and roll the red ball around the circle.

Step 3

The digital compass resembles a magnetic-needle compass.

Continue to tilt the iPhone until a compass appears on the screen. When it does, the motion sensors are calibrated.

Adjusting the Brightness

Adjust the brightness of your iPhone's display in the Setting app.

Step 1

The Settings app contains the display brightness controls..

Tap the Settings icon on the iPhone.

Step 2

Adjust the screen lighting in the Display & Brightness section.

Tap Display & Brightness.

Step 3

As you move the slider, the screen lighting adjusts in real time.

Move the slider at the top of the Display & Brightness screen from left to right until you reach your preferred level of brightness.

If you turn on Auto-Brightness in the Display & Brightness screen, then the brightness level you choose is the setting your iPhone uses to determine how to adjust the screen brightness for you as you move from one lit environment to a differently lit environment. If you turn off Auto-Brightness, the brightness level you choose remains constant regardless of the environment.


If you are unsure whether you set the level of brightness to see the truest possible colors on the iPhone, calibrate the colors on your Apple laptop's display using Apple's Display Calibrator Assistant and then use the calibrated display as a comparison as you adjust the iPhone brightness.

Adjusting the Sensitivity

Apple doesn't provide a way to adjust the sensitivity of the iPhone's touch screen. If you find the iPhone's screen sluggish or unresponsive, try the following methods to address the problem:

  • Clean the screen. Just like any glass surface, it collects grease easily, which can interfere with the screen's sensitivity.
  • Restart and -- if necessary -- reset the iPhone.
  • Take your iPhone to an Apple Store for help.