Dark Sky Meter vs Periscope
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Dark Sky Meter
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.
- Measures sky brightness
- Uses device camera
- Optional data sharing
- Contributes to scientific research
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The Dark Sky Meter app measures the sky brightness using the camera and shares it (optionally) with scientists around the globe.
Periscope
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Periscope by OysterBuild Clarity for Every Stage of Your Build Periscope is a construction visibility platform that provides property owners with structured, independent insight into their building projects. Whether you live abroad, manage multiple properties, or simply cannot visit your site regularly, Periscope ensures you remain informed through professional monitoring and documented progress reports. Key Features Periodic project monitoring Digital progress reports Visual site documentation Milestone tracking Organized report archive Secure access to project updates Periscope bridges the gap between property owners and construction sites by delivering transparency, accountability, and peace of mind. Because building your home should not feel uncertain. Periscope by OysterBuild — See Your Project Clearly.
Screenshots
Verdict
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 (#183 vs unranked). On ads, in-app purchases, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Dark Sky Meter | Periscope |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 3.8 (6 ratings) — better | — |
| Positive reviews | 40.4% of reviews | — |
| Number of ratings | 6 — better | — |
| Update frequency | Every 3 months | Every 4 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Best chart rank | #183 — better | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.6 | 15.6 |
| Further details — not scored | ||
| Size | 4 MB | 47 MB |
| Age rating | 4+ | 4+ |
| Developer | DDQ | MEMBSCRIBE TECHNOLOGY LIMITED |
In-app purchases
Dark Sky Meter
No in-app purchases
Periscope
No in-app purchases
