I've been playing an iPhone game for about a week and today the phone didn't detect some of my swipes. It still detected most of my swipes, but on a few occasions I swiped and nothing happened. I did drop my phone on a carpeted floor yesterday so I wonder if that has anything to do with it.

Are there any apps that let you test the iPhone touchscreen? I would think someone has developed an app that lets you touch/swipe anywhere on the screen and it gives you visual feedback that it detected your touch/swipe. I searched in the App Store and didn't see anything.

I found this answer that said there are a few utilities that let you test the responsiveness of your iPhone, but it didn't mention the names of those utilities. It also mentioned a web site named Sparky, but I went there on my iPhone and couldn't do anything there.

I have an iPhone 4S running iOS 6.1.3.

4 Answers 4


Sparky works for testing multitouch, so you can try different areas of the screen by holding one finger in a place you know works and move the other elsewhere. If the line breaks, then the second finger is in a location that doesn't work. You can test it full screen (without the Safari UI but the status bar is still present) by adding it to the home screen.

  • 1
    Thanks, I saw Sparky mentioned in another answer but didn't realize you had to use 2 fingers. Jul 27, 2014 at 0:30
  • The code for Sparky is on GitHub, if anyone wants to experiment with it. github.com/lbrtw/sparky Mar 3, 2016 at 6:27

i know this is an old post but if somebody is still looking for a solution to their touchscreen problems, there is an application on app store which helps you test the touch screen of your iPhone and iPad. its a brilliant app. here's the link: https://itunes.apple.com/us/app/touchscreen-test/id1126113478?mt=8


You can test most of the functions of iphone including the display by Phone diagnostics app. Link to download: https://itunes.apple.com/us/app/phone-diagnostics/id1171677218?ls=1&mt=8 or you can search Phone diagnostics or Hitek Nova.


https://itunes.apple.com/us/app/touchscreen-test/id1126113478?mt=8 --> It works. For Google Play App, I found Phone Doctor Pro which is similar to this one: https://play.google.com/store/apps/details?id=hitek.phonedoctorpro.android

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