# Dark Sky Meter vs Periscope

The clearest difference is price: Periscope at Free against Dark Sky Meter's $1.99. Periscope also leads on update cadence (every 4 weeks vs every 3 months). Dark Sky Meter's advantage is chart position (#77 vs unranked). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Periscope is free to download; Dark Sky Meter costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Dark Sky Meter ships an update every 3 months, Periscope every 4 weeks. The most recent releases landed on October 17, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Dark Sky Meter | Periscope |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[3.8 (6 ratings)](https://appshunter.io/ios/app/dark-sky-meter/id602989060/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 40.4% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 weeks** |
| Monetization | Free | — |
| Best chart rank | **#77** | — |
| Size | 4 MB | 47 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [DDQ](https://appshunter.io/developer/418328467) | [MEMBSCRIBE TECHNOLOGY LIMITED](https://appshunter.io/developer/1693264902) |

## What reviewers say

### Dark Sky Meter

[App page](https://appshunter.io/ios/app/dark-sky-meter/id602989060)

**Currently charting:** #77 Top Paid · Utilities (US App Store)

This application utilizes your device's camera to measure the brightness of the night sky. The collected data can be optionally shared with scientific researchers worldwide.

**Highlights:** Measures sky brightness, Uses device camera, Optional data sharing, Contributes to scientific research

**Features:** Vision Pro support

**In-app purchases:** none


### Periscope

[App page](https://appshunter.io/ios/app/periscope/id6760177107)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Dark Sky Meter free?

Dark Sky Meter costs $1.99, with no in-app purchases.

### Is Periscope free?

Periscope is free to download, with no in-app purchases.

### Do Dark Sky Meter or Periscope have ads?

Neither Dark Sky Meter nor Periscope shows ads.

### Which is updated more often, Dark Sky Meter or Periscope?

Dark Sky Meter ships an update every 3 months, and Periscope every 4 weeks. Most recently, Dark Sky Meter was updated on October 17, 2026 and Periscope on October 7, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*