Mobile
No-install tests for your phone or tablet. Find out how many touch points your screen tracks at once, and catch dead patches or phantom touches early.
Your phone screen is a grid of touch sensors, and any one of them can quit. The multi-touch test shows a dot for every finger you put down, so you can see the exact count your screen tracks and watch for a finger that drops out. Drag slowly corner to corner and a gap in the trail marks a dead patch where the digitizer stopped reading.
A dead patch or a phantom tap usually traces to one of a few things, and not always the glass. A thick or peeling screen protector dampens touch and fakes dead spots, so pull it off and retest first. Ghost touches, where the phone taps on its own, often come from a cheap charger or static rather than a failing screen. Real digitizer damage, from a drop or liquid, is what's left when those are ruled out. If a fault survives a restart and a clean screen, it's hardware.
Phone browsers cap how many touch points they report. On iPhone it's often five, so a count that stops there is the browser limit, not a screen fault. The rest of your phone tests live here too. Dead pixel, refresh rate, and audio checks that work on a monitor all run in your phone browser, so you can scan for stuck pixels or confirm a 120 Hz panel without an app.
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How to Test Your Phone Camera
Test your phone camera in the browser: live preview, real resolution and FPS, front and rear switch. No app needed. Fix a blank screen or blocked permission.
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How to Test Your Phone Audio
Test your phone microphone, speakers, and headphones right in the browser. Four free tools, no app to install, and what to do when something sounds off.
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How to Test Your Phone Screen for Backlight Bleed
Run a backlight bleed and color test on your phone in the browser. What each pattern reveals, LCD vs OLED differences, and when to push for a replacement.
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How to Test Your Phone for Dead Pixels
Run a dead and stuck pixel test in your phone browser in minutes. What each color reveals, how OLED and LCD differ, and what to do if you find one.
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How to Test Your Phone Refresh Rate
Check what Hz your phone display is actually running. Browser test, Android Developer overlay, and why adaptive refresh drops the rate when it matters most.
FAQ
- How do I test my phone's touchscreen?
- Open the multi-touch test and press the screen with several fingers. A dot appears under each one, so you can count how many your phone tracks at once. Then drag slowly across the whole screen and watch for any gap in the line, which marks a spot that isn't registering. Open the multi-touch test
- How many touch points should my phone track?
- Most modern phones handle five to ten fingers at once, and tablets often more. But a phone browser usually caps the count it can report, often around five on iPhone. If the test stops at five, that's the browser limit, not a fault.
- What causes ghost touches on a phone?
- A phantom tap is usually not the screen itself. A cheap or ungrounded charger is the most common cause, so unplug it and see if the taps stop. Static, moisture, and a poor-quality screen protector can do it too. If it keeps happening unplugged and with the protector off, the digitizer is failing.
- Why does part of my screen not respond to touch?
- Start with the screen protector, since a thick or lifting one creates dead spots that vanish once you remove it. Clean the glass and retest. If a patch still won't register after a restart, the digitizer under that area is damaged, usually from a drop or liquid, and needs replacing.
- Can I test my phone's screen for dead pixels or refresh rate too?
- Yes. Dead pixel and refresh rate tests both run in your phone browser, no app needed. Go full screen with the dead pixel test to hunt stuck dots, or run the refresh rate test to confirm your phone is really hitting 90 or 120 Hz instead of dropping to 60. Test your phone for dead pixels
- Can I test my phone's camera and audio here too?
- Yes. The webcam test opens your phone's front or rear camera in the browser, and the audio tests check the speakers and mic. They're the fast way to confirm a lens or a speaker works before you blame an app. How to test your phone camera