Dead Pixel Test - Screen Check

A dedicated display tester for iOS. 9 tests. Actionable results. 100% on-device.

Check any iPhone or iPad screen before you buy, sell, or repair.

Dead Pixel Test - Screen Check runs 9 display diagnostics on your device — dead pixels, burn-in, touch response, color accuracy, and more. All tests run locally. No data leaves your device.

▸ 9 DISPLAY TESTS Comprehensive diagnostics that cover every aspect of your screen.

• Dead pixel detection — cycle through solid colors to spot stuck or dead pixels • Touch screen test — visualize touch points and map dead spots • Brightness test — verify min and max brightness performance • Color accuracy — compare sRGB swatches against reference values • P3 wide gamut — check if your display renders colors beyond sRGB • OLED burn-in detection — reveal ghost images and uneven aging • Screen uniformity — expose backlight bleed and uniformity issues • Response time — measure refresh rate and detect ghosting • Pixel fix tool — attempt to revive stuck pixels with rapid color cycling

▸ SMART & ACTIONABLE Not just raw data — results you can actually use.

• Auto-detects OLED or LCD — shows only relevant tests for your display • Pass, fail, or warning verdicts — clear answers, not guesswork • Plain-language guidance — tells you what to do next • Shareable PDF reports — document screen condition for buyers or clients

▸ PRIVACY FIRST Your screen data stays on your screen.

• All processing happens on-device • No accounts, no cloud uploads, no tracking • Works completely offline

▸ PRICING

FREE: • 4 core tests — unlimited (dead pixel, touch, brightness, color accuracy) • Quick Check (all tests at once): 3 per day • Last 3 test sessions saved

PREMIUM SUBSCRIPTION

Dead Pixel Test Premium is available with the following subscription options:

Premium Weekly: $2.99/week Premium Annual: $24.99/year (Save 84%)

Payment will be charged to your Apple ID account at confirmation of purchase. Subscription automatically renews unless canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscriptions by going to your App Store account settings after purchase.

Terms of Service: https://displaytester.bulpara.com/terms Privacy Policy: https://displaytester.bulpara.com/privacy