# Flicker Insight: PWM Test — LED, Screen & Light Meter > Detects light flicker, measures ambient light and color temperature, and exports reports. (iPhone/iPad app by 名楷 王.) - Source: https://appshunter.io/ios/app/flicker-insight-pwm-test/id6794661401 (this page in markdown: same URL + `.md`) - Developer: [名楷 王](https://appshunter.io/developer/1896763218) - Category: Utilities, Lifestyle - Price: $0.99 - Age rating: 4+ - Requires: iOS 17.0 · 3 MB - Languages: Russian, Hindi, American English, Arabic, European Spanish, Korean, German (Germany), Brazilian Portuguese, Chinese (Traditional, Taiwan), Chinese (Simplified, China) and 2 more - Released: 2026-08-02 - Data updated: 2026-08-25 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/flicker-insight-pwm-test/id6794661401/reviews.md ## What is Flicker Insight? Desk lamps, eye-care lamps, LED bulbs, computer monitors, and smartphone screens may appear steady, while actually producing brightness fluctuations—flicker—that are difficult to detect with the naked eye. Prolonged exposure to flickering light may contribute to eye fatigue, eye strain, headaches, or even dizziness. This app helps you detect flicker that may otherwise go unnoticed. 【QUICK FLICKER TEST】 Point your camera at a light source or screen. The app collects adaptive samples at multiple shutter speeds for about 3 seconds and continuously updates the screening result. • Screening result: Flicker detected / No significant flicker detected / Unable to determine • Eye comfort assessment: Low, medium, or high risk based on the measured flicker level • Detailed metrics: Flicker index, modulation depth, dominant frequency, and brightness waveform 【MORE THAN FLICKER DETECTION】 • Ambient illuminance estimate: Provides an approximate brightness range to help you assess whether the environment is suitable for visual tasks. • Color temperature estimate: Provides an approximate color temperature for reference. 【EXPORT AND SHARE】 Generate a PDF report containing the waveform, frequency spectrum, light source image, and test conclusion, or export the raw data as a CSV file. 【PRIVACY FIRST, FULLY OFFLINE】 • No ads, no analytics SDKs, and no account required. • The app does not actively connect to the internet. All data remains on your device. • Videos created during measurement are processed temporarily and deleted immediately after analysis. Only measurement results and notes are retained. • You can clear all locally stored data at any time from Settings. 【AVAILABLE IN 12 LANGUAGES】 Simplified Chinese, Traditional Chinese, English, Japanese, Korean, French, German, Spanish, Portuguese, Russian, Arabic, and Hindi. 【IMPORTANT NOTICE】 This app provides consumer-grade screening of lighting conditions. Results may be affected by your phone camera’s frame rate, exposure, rolling shutter, and ambient light. It is not a substitute for professional photometric testing, standards compliance certification, or medical diagnosis. Privacy Policy: https://wwmmkk.github.io/Flicker-Insight/Privacy%20Policy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ ## Key features - Quick flicker test with camera - Eye comfort assessment - Detailed flicker metrics - Ambient illuminance estimate - Color temperature estimate - PDF report generation - Offline functionality ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/flicker-insight-pwm-test/id6794661401/reviews.md ### 5/5 — 非常好用 *2026-08-09* 确实有用，发现了好几个灯都在爆闪，谢谢作者。 ## Frequently asked questions about Flicker Insight ### What is Flicker Insight? Flicker Insight is a utility app designed to detect imperceptible light flicker from sources like LED bulbs, monitors, and smartphone screens. It helps assess potential eye strain and provides detailed lighting metrics. ### How does Flicker Insight detect flicker? The app uses your phone's camera to collect adaptive samples at multiple shutter speeds for about 3 seconds when pointed at a light source or screen. It then analyzes these samples to determine if flicker is present. ### What kind of reports can Flicker Insight generate? You can generate a PDF report that includes the waveform, frequency spectrum, a light source image, and the test conclusion. Raw data can also be exported as a CSV file. ### Is Flicker Insight free to use? No, Flicker Insight is a paid application. It is available for a one-time purchase price of $0.99. ### Does Flicker Insight have ads? No, Flicker Insight is completely ad-free. The app also does not use analytics SDKs and requires no account, ensuring a private and uninterrupted user experience. ### Can Flicker Insight be used offline? Yes, Flicker Insight is fully offline. It does not actively connect to the internet, and all data is processed and stored locally on your device. ### What devices is Flicker Insight compatible with? Currently, Flicker Insight is supported on iPhone devices. It was last updated on August 11, 2026, with version 1.0.2. ### Is Flicker Insight suitable for professional use? Flicker Insight provides consumer-grade screening and is not a substitute for professional photometric testing, standards compliance certification, or medical diagnosis. Results may be influenced by phone camera limitations. ## Version history (last 5 releases) ### 1.0.6 — 2026-08-20 Added support for quickly sharing detection results. If you have any suggestions for improving the app, feel free to contact me through the feedback option at the bottom of the Home screen! ### 1.0.5 — 2026-08-17 Improved stability when deleting history records. If you have any suggestions for improving the app, feel free to contact me through the feedback option at the bottom of the Home screen! ### 1.0.4 — 2026-08-14 Thank you for all the support! This update fixes known issues. Feel free to contact me through the feedback option in Settings if you have any suggestions for improving the app! ### 1.0.3 — 2026-08-13 Bug fixes and performance improvements. We'd love to hear your thoughts—feel free to send us your suggestions through the feedback section in the Settings tab. ### 1.0.2 — 2026-08-11 Improved the accuracy of the flicker detection algorithm, with support for detecting more types of flicker. ## More apps by 名楷 王 - [FrameGlimpse: Video to Photo](https://appshunter.io/ios/app/frameglimpse-video-to-photo/id6780122129) - [Maturity Ledger: Deposit Log](https://appshunter.io/ios/app/maturity-ledger-deposit-log/id6796212892) All apps by 名楷 王: https://appshunter.io/developer/1896763218 ## Related topics [flicker and flame](https://appshunter.io/ios/topics/flicker-and-flame) · [flicker test](https://appshunter.io/ios/topics/flicker-test) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-25.*