PWM Flicker Test
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About PWM Flicker Test
Use your camera to measure PWM flicker frequency on screens and lamps that may cause eye strain.
Many OLED phones and some monitors dim the screen with PWM, pulse width modulation, which switches the light on and off very fast. Most people never notice, but sensitive users can get eye strain, headaches or tired eyes, especially at low brightness. A PWM flicker test measures the flicker frequency so you can compare devices and find comfortable settings.
How The Test Works
Point your phone camera at the screen or lamp you want to check and hold still for two seconds. For screens, show a plain white page and lower its brightness, because most screens flicker only when dimmed. The app reports the flicker frequency with an error range and tells you when the result is borderline.
Low Vs High Frequency PWM
- Low frequency: around 240Hz to 500Hz, more likely to bother sensitive eyes.
- High frequency: 1920Hz and above, generally more comfortable.
- DC dimming: lowers current instead of pulsing, reducing flicker.
Which App The Install Button Opens
The button opens PWM Flicker Test: FlickerGauge on Google Play, which measures the flicker of screens and lights with a phone camera that supports manual exposure. It makes no medical claim. Check refresh behavior too with our Refresh Rate Test (Hz).
Key Features
- Measures flicker frequency of screens and lamps
- Uses your phone camera, no extra hardware
- Shows an error range with each result
- Flags borderline readings
- Free measurements without limits
Our Take On PWM Flicker Test
What We Like
- Helps sensitive users pick comfortable screens
- Works on monitors, phones and LED bulbs
- Simple two second measurement
What Could Be Better
- Needs a camera with manual exposure support
- Not a medical tool
Download Safety
- Official source You get it from the official store listing.
- No changes made You install the developer's own build, nothing in between.
Questions People Ask About PWM Flicker Test
01 What is PWM flicker?
It is fast on and off switching used to dim screens and LEDs, which can cause eye strain for some people.
02 How do I know if my phone uses PWM?
Lower brightness and measure the screen with a flicker test. A clear frequency reading shows PWM dimming.
03 Is high frequency PWM safe?
Higher frequencies such as 1920Hz and above are usually more comfortable than low frequency PWM.
04 Is PWM Flicker Test free to download?
Yes. PWM Flicker Test is free to download and install.
05 Is it safe to install PWM Flicker Test from here?
Yes. The button opens the official store listing, so you install it the normal way and get automatic updates.
06 How do I update PWM Flicker Test?
Once PWM Flicker Test is installed from the store, updates arrive on their own. You can also tap Install New Version on this page to open the newest release.
How To Install PWM Flicker Test
- Tap the install button. The official store page opens.
- Tap Install and wait for it to finish.
- Open the app from your home screen.
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