Dead Pixel Test vs Screen Test

Check any iPhone or iPad screen before you buy, sell, or repair. Dead Pixel Test - Screen Check runs 10 display diagnostics on your device — dead pixels, burn-in, refresh rate, touch response, color accuracy, and more. All tests run locally. No data leaves your device. ▸ 10 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 • Refresh rate — requests several frame rates in sequence and measures what the display actually delivers • Response time — check motion clarity and spot ghosting and smearing • Pixel fix tool — attempt to revive stuck pixels with rapid color cycling ▸ PRE-PURCHASE INSPECTION (PRO) Buying or selling a used device? Run a curated check sequence adapted to the panel — OLED-only checks are skipped on LCD screens. Get a clear buyer verdict, then share the result as an image card or a PDF certificate. ▸ 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 (4-test sequence): 3 runs per day • Last 3 test sessions saved SCREEN CHECK PRO Screen Check Pro unlocks every diagnostic, the Pre-Purchase Inspection, and unlimited saved sessions. Subscription options: Pro Monthly: $4.99/month Pro Annual: $24.99/year — includes a 7-day free trial 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

Before you buy a used phone, before you sell one, before the return window closes on a new one — run Screen Test. Eight quick checks, one plain-English report, and a certificate you can actually show someone. No hunting through Settings, no cryptic diagnostic codes. Just tap through eight tests, answer honestly, and get a score out of 8 you can trust — or send. WHAT SCREEN TEST CHECKS Display • Dead Pixel — solid color fields expose stuck or dead pixels • Color Accuracy — RGB and white ramps reveal banding or tint • Uniformity — a flat grey field shows backlight bleed • Contrast — a fine checkerboard judges true black depth Touch • Touch — drag across the whole panel to find dead zones • Multi-Touch — press with several fingers to see how many actually register Geometry & Motion • Grid & Lines — a fine grid reveals distortion and bent lines • Response Time — a moving object exposes ghosting and blur HOW IT WORKS Start the guided run and Screen Test walks you through all eight, one at a time — with a short explanation of what you're looking for before each one. Answer "Looked fine" or "Something was wrong" and move on. The whole thing takes about two minutes. Screen brightness is raised automatically while a test is running and put back afterward, because a dim panel can hide the exact problems you're trying to catch. YOUR REPORT At the end you get a score, a plain-language verdict, and — if anything's off — a clear note on what to say if you're the one selling. Run it again later and Screen Test tells you what changed since your last check, so a new scratch or a new dead pixel doesn't slip past you. Privacy Policy : https://forms.gle/dnBUgnpqw4AREio97 Terms of Use : https://forms.gle/2uy2JqJa2JjkTZpo8