Boop Light Detector

Last modified
Wednesday, October 4, 2017

Description of App

Boop is an an app to detect levels of light and interpret this information with sound. It allows its blind and visually impaired users to detect whether lights are on or off. It covers a broad range of light levels which spans from sensing daylight through open windows to checking whether the indicator light is on for a wifi router.

How to use
- Open app and accept permissions to use camera (first time only)
- Point phone towards a light source
- Listen and feel as your phone changes tone and frequency of vibration while getting closer to the light
- Only the light level at the center of the camera (directly perpendicular to the phone face) is measured. Pointing the phone directly at the light source will get the highest reading.

Volume control
- Volume control buttons on side of phone control Boop's playback volume
- Mute will completely turn off sound
- Toggle vibrate on or off manually with the switch at the bottom of the app

Voice over features
- 2 finger scrub to turn vibrate on or off
- 2 finger double tap to close app
- Tap center of app to read light level

Safety and Privacy
- Boop requests camera access to determine the amount of light in the center of the camera's field of view. It computes the luminescent score and does not save any images.
- Boop does not store any metadata or other user generated content. Boop does not have advertisements.
- Boop does not have any questionable content - it only displays two types of messages: luminescent readings and an error message when Boop does not have access to the camera.

For more information see our website:



Free or Paid


Apple Watch Support


iOS Version


Device(s) App Was Tested On


Accessibility Comments

Fully accessible and really useful.

VoiceOver Performance

VoiceOver reads all page elements.

Button Labeling

Not applicable for this app.


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

Other Comments

This app is great, and I hope it gets more cool features to make it even more better.

Boop Light Detector.mp3

I've did a demo of this app.

Click the Dropbox link to listen.

Boop Light Detector.mp3


4 people have recommended this app

Most recently recommended by tunmi13 3 years 11 months ago



Submitted by Albarra XVI on Thursday, May 24, 2018

I really love this app.
It's free. It also has sounds, percentage, and vibration. Very cool. I have no complaint about this app at all.

Boop is better than Light Detector app.

This app is highly recommended.

Submitted by Greg Epley on Monday, January 21, 2019

January 2019. Not sure what's going on with this app, but when I downloaded and opened it on my iPhone 8, IOS 12.1.2, it didn't ask for any permission to use the camera, and it shows three dimmed buttons: 0, 1, and something about vibrations being toggled on. So, it's essentially useless for its intended purpose.