Screen Test vs TouchGap

Check your iPhone display in seconds. Screen Test fills the screen with pure colors so dead, stuck or faded pixels stand out, and helps you test touch, burn-in and uniformity before you buy or sell a phone. Free: • Color test: white, black, red, green, blue, yellow, cyan and magenta at full brightness. Tap for the next color, long press to see its name. Premium (one-time purchase, no subscription): • No ads • Touch grid: drag over every cell to find dead touch zones • Multi-touch: see how many fingers the screen detects at once • Gradients, gray levels and checkerboard: spot burn-in, banding and uneven panels • Custom color: fill the screen with any color • Stuck pixel fixer: rapid color cycling, with a photosensitivity warning • Used iPhone check: run the tests in order, mark pass or problem with a note, share a PDF report and keep a history on your device Who it is for: • Checking a used or new iPhone before you buy it • Finding dead pixels, stuck pixels and OLED burn-in • Finding dead touch zones after a drop or a screen repair • Repair shops checking a display before and after a repair Bought Screen Test before it became free? Premium is already yours. Use "Restore purchases" in Settings if needed. Tips: clean the screen first, test dark colors in a dim room and light colors in a bright room. Languages: English, Turkish, German, Spanish, Portuguese, Japanese, French, Arabic, Ukrainian, Russian and Chinese (Simplified). To change the language, open iOS Settings, scroll to Screen Test and choose Language. Privacy: no account, no camera or microphone access. Reports stay on your device. Ads are served by Google AdMob; you can choose whether to allow tracking. The stuck pixel fixer flashes colors rapidly and is not suitable for people with photosensitive epilepsy. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://yunusgunduz.com/pp/ScreenTester-PrivacyPolicy.html

Does your screen sometimes seem to miss a touch, but you cannot show exactly when or where it happens? TouchGap is a visual diagnostic tool that draws the touch events delivered to the app by your iPhone or iPad. It goes beyond drawing lines by showing time between events, samples per second, cancellations, and recurring locations so you can examine touch continuity. Five guided test modes • Trace Test: Follow a guide to review the input path across different screen areas. • Hold Test: Keep a finger down and watch whether contact remains continuous. • Multi Test: Move one, two, or three fingers together to check multitouch input. • Ghost Watch: Leave the screen untouched and record unexpected input delivered to the app. • Tap Test: Review recognition of single, double, and triple taps. See the path. Measure the timing. • A different colored trail and live contact point for each finger • Red dotted segments when the interval between received events exceeds your selected threshold • Samples per second, maximum event interval, suspected gap count, and cancellation count • A result summary marked Stable, Caution, or Retest • Diagnostic records with device model, OS version, and test time • Save a result image or share a PDF report Repeat the same test before and after removing a case or charger, or before and after a repair, to compare results under different conditions. No ads are shown on the active test screen, keeping the touch area clear. Important limitation TouchGap does not confirm or guarantee a hardware diagnosis. Every value and visual is based only on events that iOS delivers to TouchGap. Slow movement, system load, display refresh-rate changes, system gestures, and accessories can also affect event timing. Compare several repeated tests under the same conditions. If the issue continues, contact Apple or an authorized service provider for a hardware assessment.