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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 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.

Dark Zone

Dark Zone is available now for Android phones & tablets. It is distributed through Knightware (see below) for phones and tablets running Androidâ„¢ 4.4 and above. The app is free but requires 'sideloading' onto your phone or tablet. For your security, the installation package is digitally signed by Knightware.

How To Install (Sideloading the app)

0. Uninstall any pre-existing version of DarkZone on your device.

1. Download the installation package below (DarkZone.apk)

2. Save the apk file to storage on your device or a cloud storage service accessible by your device.

3. Open the storage location with a file manager on your device. This might be a cloud storage app or a device storage app.

4. Tap DarkZone.apk to begin installation.

5. You see the message Do you want to install this application? It does not require any special access. Click Install.

6. You see the message Installing.

7. You may see the message Blocked by Play Protect. Click Install anyway.

8. Tap Open to run DarkZone


Please click Download below to get DarkZone for Android (6.6 MB)
Make sure to save the file to your mobile device before running it.

(No personal data is collected.)
App last updated: 31 Jan 2021