Dark Sky Meter
Helps you measure the night sky brightness

The Award winning Dark Sky Meter by DDQ helps you measure the night sky brightness with the press of a button.
Get instant information about the night sky quality and contribute to create a global map of sky darkness.
Featured on BBC Television, CBS.com, Scientific American, Scistarter and many more influential websites and magazines.
At a fraction of the cost of a commercial Sky Quality Meter.
Available for download now!

User comment: Fantastic! Settling the argument with my observing friends over which of our sites is better is worth the $5 all by itself. And if I win the wager for a beer, it will be like getting the app for free.
Jeff Morgan, Prescott AZ

Download the app here!


Dark Sky Meter 2.5

The app now works with a new backend service hosted by myself. That means that your valuable data isn’t going to third parties.

Update 1.9.x

What’s New in Version 1.9.x

  • NEW Added user tag
  • For reference on the map, you can leave a tag. It’s found in the settings menu and shown on the map on this website.
  • NEW Improved ‘My Readings’ panel
  • When you click a recent reading you submitted, the place on the map is shown where you took that reading.
  • NEW Scientific data improvements
  • Added split RGB channel info for metadata analysis.
  • NEW Settings panel
  • More readable and doesn’t mess up your night vision. The settings panel will move to the main menu.

Update 1.7: 5S support

What’s New in Version 1.7

  • NEW Added support for iPhone 5S
  • NEW Added support for iPhone 5C

Update 1.6: FOV change, 4S improvement

We’ve maximized the Field of View (15 degrees). This results in more accurate measurements, especially for iPhone 4S

Update 1.3 – 1.4

Added Milky Way in Zenith option to conditions panel.

iPhone 5 measurements resulting in SQM 22 or higher are rejected.


Update 1.2

What’s New in Version 1.2

  • NEW   Added darkness indicator (bottom screen)
  • darknessindicator

    – Warns iPhone 4( Not 4S and5) users about unreliable results.


  • NEW   added seeiing and transparency values to cloud prediction
  • seeingtransperancy

  • NEW   Color scheme (gray on black). Note that the font size is affected. Will fix that asap

Version 1.1

April 25, 2013
  • NEW My Data Screen. Shows all your measurements with a delete option
  • NEW Improved map views. Shows an area of 70×70 kms with colored pushpins (darker=better 🙂 )
  • NEW Advanced calibration allows you to perform device specific tweaks on higher magnitudes  
  • FIXED Various UI enhancements 


Version 1.0

April 15, 2013
  • NEW Initial release for iOS