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!


Measure air AND light pollution with your iPhone!

👤 🕔 September 9, 2014 Comments Off on Measure air AND light pollution with your iPhone!

In 2012, i’ve developed the iSPEX iPhone app for Leiden University. With a tiny spectro/polarimeter-add on, you can determine air pollution by sweeping the iPhone to the daytime sky. Thousands of people contributed to science during 2 days of measurement. You can read more on the iSPEX website.
With the dark sky meter you can measure light pollution at night. If you use both apps and own the required optical add on for measuring air pollution you are all set! During daytime you can investigate the air quality and see how it impacts light pollution for example. Do your own research with your own optical laboratory: the iPhone.