Guided manual screen checks for Mac, iPhone and iPad. View visual patterns, observe motion, visualize touch events delivered by the system and record what you notice in a local HTML summary. The app does not automatically diagnose hardware or verify parts.
Published by WIT-KOMP
Pick a group, inspect the patterns yourself and record your own observations. ScreenTest WK displays visual aids; it does not analyze the physical panel.
White, black, R/G/B/C/M/Y and color bars can help you visually notice points that differ from a solid background.
Use gray levels, gradients and steps to inspect visible uniformity, streaks, stains and banding yourself.
View black and 2–15% gray patterns in a dark room and note any bright areas or uneven zones you can see.
Observe moving bright objects on black and note any visible halo; appearance depends on brightness and viewing conditions.
Observe a moving pattern with an approximate app-rendering FPS counter. It is not a hardware refresh-rate measurement.
Use checkerboards and grids to visually assess sharpness, moiré patterns and scaling.
Visualize touch events received by the app, count simultaneous events and manually draw across the screen.
Show a number and system-reported parameters on connected monitors; display patterns on selected screens.
View system-reported device information and export a local HTML summary of your checklist choices and notes.
One app, native on every screen you own.
Last updated: July 31, 2026
This Privacy Policy describes how ScreenTest WK ("the App") handles information while displaying manual screen-checking patterns and technical information on macOS, iOS and iPadOS devices.
The publisher does not receive personal data from ScreenTest WK. The App does not transmit personal data to the publisher, and does not include analytics, advertising or tracking frameworks. Its screen-checking features operate entirely on the device.
To display its patterns, controls and technical information, the App processes only local data:
This data is used solely to display information and create a user-requested HTML summary. It never leaves the device unless the user explicitly shares that summary.
The HTML summary is created locally and saved or shared only at the user's explicit request (the save dialog on macOS, the system share sheet on iOS/iPadOS). The developer has no access to its contents.
The App offers optional, consumable in-app purchases. Product information and payments are handled by Apple's App Store through StoreKit under the Apple Privacy Policy. The App temporarily processes the product identifier, transaction identifier and status needed to handle and finish a purchase. The developer does not receive Apple Account credentials, card numbers or bank details, and the App sends no purchase information to the developer's servers.
The App does not request access to location, contacts, photos, microphone or camera, and requires no account.
The App is not directed at children. The developer receives no personal data from anyone, including minors.
This Privacy Policy may be updated from time to time. Any changes will be reflected on this page along with the effective date. A standalone copy is also available at privacy.html.
ScreenTest WK only displays visual patterns, touch events supplied by the operating system and system-reported technical information. It records the user's own observations. It does not inspect the physical panel, automatically diagnose hardware, confirm whether a defect is present or absent, verify part authenticity, or replace an assessment by Apple or a qualified service provider. Observations depend on the device model, viewing conditions and the person performing the check.
For help with ScreenTest WK, contact the developer or check the quick answers below.
Choose a suitable brightness and turn off True Tone and Night Shift (Settings → Display). View dark-zone and dimming patterns in a dark room. Brightness and ambient light affect what you can see.
The public API does not provide an expected limit for a specific model. Practical trials often show about 5 simultaneous touches on iPhone and about 10 on iPad, but this is only an illustrative reference—not a required result or diagnostic criterion. The number delivered to the app depends on the model, system behavior and testing conditions; a lower count alone does not establish a hardware fault.
No. ScreenTest WK cannot determine whether a screen or another part is genuine or has been replaced. Touch behavior, app-rendering FPS, color-gamut information and macOS EDID data are not proof of part authenticity. On supported Apple devices, use Settings → General → About → Parts & Service History, or contact Apple or a qualified service provider for an appropriate assessment.
On macOS the HTML summary is saved via the save dialog and opens in your browser. On iOS/iPadOS you share it through the system share sheet – to Files, AirDrop or Mail.
The App follows your system language (Polish system → Polish, otherwise English). You can switch between English and Polish anytime in About → Settings.
ScreenTest WK requires macOS 14 Sonoma or later on Mac, and iOS / iPadOS 17.0 or later on iPhone and iPad.