knightwareKnightware StoreSite SearchAbout the CompanyHome




Dark Zone Mobile App

For Android & iOS

Dark Zone
Dark Zone is a simple app for Android & iOS that allows you to convert a sky brightness measurement to other useful units of measure:

  • MPSAS - magnitude per square arc second
  • NELM - naked eye limiting magnitude
  • Mcdpsm - Millicandelas per square meter
  • color as defined in The New World Atlas of Artificial Sky Brightness (2016, Falchi et al)

Dark Zone is a handy companion that you can use with Unihedron's Sky Quality Meter, and Knightware's SQM Reader and SQM Reader Pro desktop software.

Dark Zone technical support is available here.


Dark Zone is available now for Android phones & tablets

Get it on Google Play
Android™ phones and tablets running Android 4.1 (Jellybean) through 8 (Oreo).

Android is a trademark of Google LLC.
The Android robot is reproduced or modified from work created and shared by Google and used according to terms described in the Creative Commons 3.0 Attribution License.


Dark Zone is available now for iOS (iPhone & iPad)

App Store
iPhones and iPads running iOS 11+

Apple, the Apple logo, iPad and iPhone are trademarks of Apple Inc., registered in the U.S. and other countries. App Store is a service mark of Apple Inc., registered in the U.S. and other countries.
IOS is a trademark or registered trademark of Cisco in the U.S. and other countries and is used under license.