Dead Pixel Test - Screen Check
Display & Touch Diagnostics
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
NEW: Pre-Purchase Inspection. A curated check flow with a shareable PASS/FAIL certificate. Try Screen Check Pro free for 7 days.
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
Ratings & Reviews
Buying a used iPhone? This update is for you.
• NEW: Pre-Purchase Inspection (Pro) — a curated check sequence adapted
to your panel, with a clear buyer verdict and a shareable image card
+ PDF certificate
• NEW: Refresh Rate test — requests several frame rates in sequence and
measures what your display actually delivers
• NEW: Fully localized into 13 languages
• Response Time test refocused on motion clarity, ghosting, and smearing
• Fixes and polish throughout
All tests run on-device. No data leaves your phone.
The developer, BULPARA TEKNOLOJI LIMITED SIRKETI, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- BULPARA TEKNOLOJI LIMITED SIRKETI
- Size
- 9.4 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 13 more
- English, French, German, Hindi, Indonesian, Italian, Japanese, Portuguese, Russian, Simplified Chinese, Spanish, Thai, Turkish, Vietnamese
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Premium Annual $24.99
- Premium Weekly $1.99
- Premium Monthly $4.99
- Copyright
- © Bulpara 2026