# Flicker Meter for Light - PWM — Screen LED Eye Strain Headache

> Detects and measures invisible light flicker to identify flicker-free alternatives. (iPhone/iPad app by Contechity AB.)

- Source: https://appshunter.io/ios/app/flicker-meter-for-light-pwm/id1672848632 (this page in markdown: same URL + `.md`)
- Developer: [Contechity AB](https://appshunter.io/developer/1649290454)
- Category: Utilities, Health & Fitness
- Price: Free with in-app purchases
- Rating: 4.60/5 from 47 App Store ratings · 19 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 39 MB
- Languages: American English, Afrikaans, Bulgarian, Catalan, Croatian, Czech, Danish, Dutch, Estonian, Filipino and 30 more
- Released: 2023-03-04
- Data updated: 2026-08-24
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/flicker-meter-for-light-pwm/id1672848632/reviews.md

## What is Flicker Meter for Light?

Suffering from eye strain, headaches, or migraines from LED lights and screens? You're not alone. Many LED lights, screens, and fluorescent lights flicker at high frequencies invisible to the naked eye, yet capable of causing headaches, eye strain, fatigue, and other symptoms.

This app helps you identify which light sources and screens are flickering, measure the intensity, and find flicker-free alternatives for your health and comfort.

FEATURED IN COMPUTER ACTIVE MAGAZINE
Computer Active recommends this app for detecting headache-inducing flicker.

KEY FEATURES
• Detect invisible high-frequency flickering in LED lamps, screens, and fluorescent lights
• Measure flicker intensity in percentage
• Measure flicker frequency in Hz
• Identify flicker-free light sources
• Easy-to-use interface with instant results

HEALTH BENEFITS
• Reduce eye strain and fatigue
• Minimize headaches and migraines
• Create a more comfortable work environment
• Make informed decisions about lighting purchases

PERFECT FOR
• Office workers spending long hours under artificial lighting
• People sensitive to light flicker
• Anyone experiencing unexplained headaches or eye strain
• Professionals evaluating workplace lighting
• Bird owners monitoring aviary lighting (birds are highly sensitive to flicker)

Full support for 40 languages with integrated documentation.

Privacy Policy: https://flicker-meter.contechity.com/pp.html
End User License Agreement: https://flicker-meter.contechity.com/eula.html

Got questions or feature requests? Email me at apps@contechity.com — I'll personally respond.

Download Flicker Meter today and take control of your lighting environment for better health and comfort!

## Key features

- Detect invisible high-frequency flickering
- Measure flicker intensity (%)
- Measure flicker frequency (Hz)
- Identify flicker-free light sources
- Easy-to-use interface
- Instant results

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Full access | $0.99 | per month |
| Full access | $4.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Full access | $6.99 | one-time |
| Full access | $6.99 | one-time |


## Recent user reviews (10 of 19)

All indexed reviews: https://appshunter.io/ios/app/flicker-meter-for-light-pwm/id1672848632/reviews.md

### 5/5 — Justify buying new monitor

*2026-06-12*

Great tool!

**Developer response:** Thank you so much for the kind words! A flickering monitor is no fun. Thanks a lot for sharing your experience with the app!

### 2/5 — Unclear that it actually works

*2026-03-04*

I tested on every light in my house, LEDs and incandescent and used a tripod for stability. It said no flicker for every light but I know that isn’t true. I don’t know how I can trust the output - but I subscribed “for life” lol

**Developer response:** Thanks for taking the time to test thoroughly with a tripod. Incandescent bulbs often do not show flicker since they stay hot between AC cycles, so those results sound right. For LEDs, it depends on the driver - quality ones have good power smoothing and truly don't flicker. Try on some fluorescent lamps and I am pretty sure you will see that the app will detect there flicker. Thank you and feel free to write directly to me at apps@contechity.com

### 5/5 — Flickering from Los Lunas N.M. 87031 Data Center

*2026-02-12*

Our lights flicker all the time, the power level problems here are related to the Benghazi like Data Center under construction. Surges and RF effects from Drones also affect the lights. People here have filed and won a Class Action suit for the Dirt related to this data center+- it’s likely another suit will follow RE: electronic smog destroying everything from appliances to Mental Health- that’s right, we feel the effects and it’s painful and it’s been noted in the medical record, people want out of this community- it’s toxic and hurts!

**Developer response:** I really appreciate the 5-star rating! I'm sorry to hear about the difficult situation you and your community are facing with the power quality issues and their effects. It sounds incredibly challenging. I'm glad Flicker Meter has been useful in documenting the flickering problems you're experiencing. Thanks

### 2/5 — Not free

*2026-01-26*

Listed as free on the app store, after using it once it would kick me out after declining to pay for a subscription. Useful for the one time i could open it

**Developer response:** Yes, the app is free to use for a few weeks so that everyone can try it out. After that, if you like it, a subscription or a one-time purchase is required for continued use. Let me know at apps@contechity.com if you did not have time enough to test it, so that I can prolong your test period. Thank you so much!

### 5/5 — Great app and support

*2025-11-27, version 3.1.0*

The support for the app when I contacted was excellent. The app works much better than the other apps I tried for this. Would definitely recommend

### 1/5 — Doesn't work

*2025-11-04*

The app won't pick up any flickering on an LED light with PWM dimmer. That's how PWM dimmers work they flicker. Waste of money.

**Developer response:** Strange! Clearly it does not work properly for you. I am very interested in solving this - if you have the time, I would be very happy if you could send me an email so that I can ask you some questions to figure out what is causing this. apps@contechity.com
Thank you!

### 3/5 — Not as fussy as my eyes

*2025-10-21*

Flicker meter would say light was steady when I felt like I was in a claymation movie, and the video preview would show light bands rolling across the frame.  Maybe it just doesn’t detect flicker over 100hz.  It tries to do exactly what I want, it just doesn’t seem to get there.

**Developer response:** Thanks for your review. Sorry for this! Would you please send me an email, so that I can sort out why this does not seem to work on your device. It should absolutely be able to detect flicker above 100Hz. apps@contechity.com Thank you!

### 5/5 — Works as advertised

*2025-08-24*

I was able to figure out which rooms had flickering lights and which didn’t. The app properly detected the rooms I was suspect of flickering, having seen them flicker in slow motion videos. Great app!

**Developer response:** Thanks a lot for sharing your experience with the app - it is very much appreciated!

### 1/5 — Crashing for me on the first screen

*2025-07-18*

The first screen is a buy screen to pay or agree to subscribe to a trial before using the app or even seeing it 

The app showed the payment screen only a few times but no buttons worked, it just crashes if I click anything

I haven’t had an app crash on iOS in so long I didn’t actually realize what happened. I rebooted my phone. It’s up to date. 

Now on subsequent launches, this crashes immediately after opening now without showing a buy screen

This PWM tester app is a great idea but the dev seems so intently set on getting money from every single user and ensuring they know you will pay on the first launch they should just make this a pay app not In App Purchases

Again, this app does nothing unless you open your wallet or agree to a trial, but that didn’t work for me so it just does nothing

**Developer response:** Oh, I am so sorry for this! Thank you so much for reporting. Actually the app can be used for a few weeks without signing up to anything - simply tap close on the paywall. But the crash is serious. Would you please send me an email so that I can learn more about it and fix this issue? It would be very valuable as I really would like to correct this! apps@contechity.com And of course I will give you a full refund. Sorry again! BR, Björn

### 5/5 — Al

*2025-06-15, version 3.0.1*

Great program
Thank you!

## Frequently asked questions about Flicker Meter for Light

### What does the Flicker Meter app do?

This app helps you identify light sources and screens that emit invisible high-frequency flickering. It measures the intensity and frequency of this flicker, which can cause symptoms like eye strain, headaches, and fatigue. The goal is to help you find flicker-free alternatives for a more comfortable environment.

### How does the app detect flicker?

The app utilizes your device's camera to detect high-frequency flickers that are invisible to the human eye. It analyzes the light patterns to determine if a light source or screen is flickering and quantifies the intensity and frequency of this flicker.

### Is the app free to use?

The app is free to download and use, offering core functionality for detecting and measuring flicker. Additional features or advanced capabilities may be available through in-app purchases.

### Who would benefit from using this app?

Anyone experiencing eye strain, headaches, or migraines potentially linked to artificial lighting or screens can benefit. This includes office workers, individuals sensitive to light flicker, and professionals assessing workplace lighting. Bird owners may also find it useful for monitoring aviary lighting.

### What are the health benefits of using this app?

By identifying and helping you avoid flickering lights, the app aims to reduce eye strain and fatigue. It can also help minimize headaches and migraines associated with light sensitivity. Making informed decisions about lighting can contribute to a more comfortable and healthier environment.

## Version history (last 5 releases)

### 3.3.3 — 2026-06-18

• Added support for sharing individual measurements.
• Stability improvements.

Missing a feature? Let me know in a review!

### 3.3.2 — 2026-05-09

• Made it clearer in the main tab that frequency measurement requires calibration to return a value in Hertz.
• Misc minor improvements.

These improvements were suggested by users. Got an idea too? Share it in a review!

### 3.3.0 — 2026-03-10

• Simplified the flicker frequency calibration.

This feature was suggested by a user. Got an idea too? Share it in a review!

### 3.2.0 — 2025-12-25

• Added the possibility to export saved measurements
• Stability improvement

Please rate the app here on the App Store - it helps others find the app and gives me incentive to develop it further. Thank You!

### 3.1.0 — 2025-10-10

• Added the possibility to save measurements with comments

Please rate the app here on the App Store - it helps others find the app and gives me incentive to develop it further. Thank You!

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All apps by Contechity AB: https://appshunter.io/developer/1649290454

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*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 2026-08-24.*