Light Detector


Description of App: 

Have you ever listened to light? With Light Detector, now you can!

Light Detector transforms any natural or artificial light source it encounters into sound. Light Detector is easy to use! Just run the application and point your iPhone camera in any direction. You will hear a higher or lower sound depending on the intensity of the light.

If you are blind, Light Detector helps you to be more independent in many daily activities. At home, point your iPhone towards the ceiling to understand where the light fixtures are and whether they are switched on. In a room, move the device along the wall to check if there is a window and where it is.

You can find out whether the shades are drawn by moving the device up and down.

Bring Light Detector with you to discover what is around you at the speed of light.

Apple Watch Support: 

Not Known



Free or Paid: 


Device(s) App Was Tested On: 


Accessibility Comments: 

This app is very accessible. There are no controls. Just a 400 hurtz sine wave that varies in pitch when light is encountered. Press home to get out.

VoiceOver Performance: 

VoiceOver reads all page elements.

Button Labeling: 

All buttons are clearly labeled.


The app is fully accessible with VoiceOver and is easy to navigate and use.

Other Comments: 

Simple app that does what it says. It uses the camera on the back of the phone, so hold accordingly. I just loaded this and walked around my home looking for lights. It found them. It found the under water light in my hot tub. I was able to differentiate between them. This is a good general light probe, definitely worth the 99 cents. It's designed to meet our needs, and works exactly as advertised. Not bad for a first version. Now let's see what they come up with next. However, i hold a paid app to a little higher standard than I would a free one. My only complaint is that a sensitivity slider would be nice. I found a small light on my coffee maker, but no way to tell exactly which light was lit even when I covered it with my finger. Having the tone change for a flashing light might also be a nice touch.