# DarkZone 2

> Read SQM-LE, show sky brightness values and dark zone color.

Canonical page: [https://chrome-stats.com/d/com.knightware.DarkZone2](https://chrome-stats.com/d/com.knightware.DarkZone2)

## Overview

- **ID:** `com.knightware.DarkZone2`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** Phyllis Lang
- **Category:** EDUCATION
- **Downloads:** 1
- **Version:** 2.0.0
- **Last updated:** 2025-10-13
- **First published:** 2025-10-13
- **Publisher country:** US
- **Size:** 51 MB
- **Data as of:** 2026-09-06
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.knightware.DarkZone2)
- **Website:** [https://knightware.biz](https://knightware.biz/)
- **Privacy policy:** [https://knightware.biz/darkzone/privacy.htm](https://knightware.biz/darkzone/privacy.htm)

## Description

DarkZone2 allows astronomers and other researchers to read a sky brightness value from an ethernet-connected Sky Quality Meter and show the value in multiple units of measure. It also shows the corresponding dark zone color as defined by the New Atlas of Artificial Sky Brightness  (2016, Falchi et al).<br><br>Units of measure are:<br><br>Mpsas  = magnitudes per square arcsecond<br>Nelm   = naked eye limiting magnitude<br>Mcdpsm = millicandelas per square meter

## Rankings

- #3,128,176 — Overall

## Permissions and access

### Permissions

- `android.permission.INTERNET`
- `com.android.vending.CHECK_LICENSE`

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Source: [Chrome-Stats](https://chrome-stats.com/d/com.knightware.DarkZone2)