ScreenTest WK vs TouchGap

ScreenTest WK is a collection of guided visual patterns for manual screen observation on iPhone and iPad. The app presents patterns and system-reported information; you decide what you see and record your own observations. MANUAL OBSERVATION PATTERNS • Solid colors and vertical color bars • Gray levels, gradients and tonal steps • Dark-area patterns and bright objects on black • Checkerboards and grids • A moving pattern with an estimated app-rendering FPS counter TOUCH VISUALIZATION View direct touch events delivered to the app by iOS, see the simultaneous-contact count, or draw across the screen to observe how the on-screen trace follows your finger. iOS does not provide the app with an expected touch limit for a particular model, so the count is not used as a pass/fail result. DEVICE INFORMATION AND NOTES View device and display information reported through public iOS APIs. Record your own checklist selections and notes, then share a locally generated HTML observation summary. IMPORTANT LIMITATIONS ScreenTest WK does not inspect or analyze the physical panel, automatically detect faults, certify device condition, measure the display's physical refresh rate, or determine whether a part is genuine or has been replaced. The FPS value describes only the approximate rendering rate of the app's animation. What you can see depends on the device, brightness, viewing conditions and your own observation. PRIVACY The screen-observation features run locally. No account is required. The publisher does not receive your device information, touch positions, checklist choices or notes. The app has no advertising, analytics or tracking. The complete app is available without payment. Optional consumable in-app purchases are tips that support continued development and unlock no features or content. Available in English and Polish. Requires iOS or iPadOS 17 or later.

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.