arifz.
DISPLAY CHECKER FOR ANDROID

Get to know
your screen.

A tiny dot that won’t go away? A spot that misses your taps? Take a closer look with simple display and touch tests.

Get it on Google Play See what you can test
  • Free to use
  • No ads
  • No account

A personal project by arifz.

A LOOK INSIDE
Display Checker home screen in dark mode, with display information and test shortcuts
The tests, all in one place.

A SMALL CHECK, AT THE RIGHT TIME

01

Before you buy

Trying a second-hand phone? Check the screen and touch response before you decide.

02

When something looks off

Use plain colors and test patterns to get a better look at a mark, patch or uneven shade.

03

After a screen replacement

Try the corners, edges and display patterns to see how the replacement feels.

LOOK CLOSER

Small tests.
Useful answers.

Choose the check you need. There’s no long setup before you can get started.

Find the odd pixel

Switch through solid colors and look for dots that stay dark, bright or a different color.

Defective Pixels

Look for uneven color

Check for patches across the panel, visible bands in gradients, and changes when you tilt the phone.

Uniformity · Gradient · Viewing Angle

Try every part of the screen

Tap the grid, draw across the edges, or drag a ball around. Watch for spots that don’t respond as expected.

Tap · Scribble · Drag

Take a look at the details

Explore sharpness, gamma, color differences and motion. Display Info shows the specifications reported by your device.

Sharpness · Gamma · Color Distance · Response Time

These are visual and touch checks. They help you inspect a screen; they don’t repair pixels or certify that a phone has no hardware problems.

FROM THE APP

Here’s what it looks like.

Simple screens that leave room for the test. Tap any image for a closer look.

Sharpness test showing a black and white Siemens star pattern
01 Check fine detail
Scribble test showing colored strokes drawn across the screen
02 Follow your touch
Gradient test showing a smooth transition from black to red
03 Look for color bands
Display Checker settings with System, Light and Dark appearance choices
04 Choose light or dark

NOT SURE WHERE TO START?

Buying a phone?
Try these first.

Find a comfortable brightness and wipe the screen so a speck of dust doesn’t look like a bad pixel.

Open Google Play

  1. Start with solid colors

    Open Defective Pixels. Look across each color for small dots that don’t match the rest of the screen.

  2. Check the whole panel

    Open Uniformity and look for unusually bright or dark areas. Tilt the phone to see how the picture changes.

  3. Don’t forget the edges

    Use Tap and Scribble across the corners and sides. Look for missed taps or breaks in a continuous stroke.

A FEW THINGS TO KNOW

Before you install.

Is Display Checker free?

Yes. The app is free to use, has no ads, and doesn’t ask you to create an account.

Do the tests work without internet?

The display and touch tests run on your phone and work offline. Internet access is used for services such as analytics, crash reporting and opening the privacy policy.

Can it fix dead pixels or screen burn-in?

No. It provides patterns that help you look for display problems. It cannot repair the screen or automatically confirm a hardware fault.

Does it collect any data?

Test inputs such as scribble strokes stay on your device. The app uses Firebase Analytics and Crashlytics for usage information and crash reports. You can read the details in the privacy policy.

Will it work on my phone?

Display Checker is an Android app. Google Play shows whether it’s available for your device. The information shown in Display Info depends on what your phone supports and reports.

DISPLAY CHECKER

Give your screen
a closer look.

Pick a test. See how your phone responds.

Get it on Google Play