FlickerCheck: PWM Meter
Screen & LED Flicker Test
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Check screens and lights for visible brightness flicker in seconds. FlickerCheck uses your iPhone camera to estimate flicker level, modulation and dominant frequency.
FlickerCheck turns your iPhone camera into a fast screen and light flicker screening tool.
Point the camera at an OLED phone, monitor, LED bulb or lamp. FlickerCheck automatically looks for a stable signal, analyzes brightness variation and presents a result you can understand without reading raw engineering data.
KEY FEATURES
• Screen and Light measurement modes
• Automatic signal quality guidance
• Estimated dominant flicker frequency
• Modulation depth estimate
• Low / Moderate / Strong flicker level
• High / Medium / Low measurement confidence
• Captured brightness waveform
• Save and revisit measurements in History
• All camera analysis stays on your device
HOW IT WORKS
FlickerCheck samples brightness from the camera image over time, checks signal quality and looks for repeatable brightness variation. When the signal is not reliable enough, the app says Unable to determine instead of presenting a falsely precise value.
IMPORTANT LIMITATIONS
FlickerCheck is a camera-based screening utility, not laboratory equipment. Camera frame rate, exposure, rolling shutter, movement and frequencies above the camera sampling range can affect results. High-frequency PWM may not be recoverable as its true physical frequency.
FlickerCheck does not diagnose eye strain, health conditions or product safety.
PRIVACY
Camera frames are processed locally on your device. FlickerCheck does not upload measurement images or collect your saved measurements.
MONETIZATION
Two successful measurements are included free. Lifetime Pro unlocks unlimited Screen and Light tests with one non-consumable purchase. Failed or indeterminate measurements do not consume the free allowance.
Terms of Use:https://www.nicolaigame.top/common/terms-en.html
Privacy Policy:https://www.nicolaigame.top/common/privacy-en.html
The developer, biaopeng zhou, 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 Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- biaopeng zhou
- Size
- 10.1 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 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 Simplified Chinese
- Age Rating
9+
- 9+
- In-App Purchases
Yes
- Lifetime Pro $4.99
- Copyright
- © 2026 SingleLeafApps