Dark Sky Meter vs Temtop
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.
Temtop
This app detects formaldehyde, PM2.5, and TVOC using advanced sensors. It provides accurate and reliable environmental data for your home or workspace.
- Formaldehyde detection
- PM2.5 detection
- TVOC detection
- British Dart electrochemical sensor
- US TEMTOP laser particle sensor
- Accurate and reliable data
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Detection function: formaldehyde, PM2.5, TVOC It is equipped with British Dart formaldehyde electrochemical sensor, which effectively reduces gas interference and makes formaldehyde detection more accurate. Accurate and reliable data using the US TEMTOP laser particle sensor
Screenshots
Verdict
The clearest difference is price: Temtop at Free against Dark Sky Meter's $1.99. Temtop also leads on ratings volume (80 vs 6) and update cadence (every 5 weeks vs every 3 months). Dark Sky Meter's advantage is rating (3.8 vs 2.9) and review sentiment (40% vs 32%). On ads, in-app purchases, monetization model and device support 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
Temtop 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 holds the better App Store score, 3.8 against 2.9. That said, the two scores are not equally well evidenced: Temtop has 80 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 40% of Dark Sky Meter's written reviews are positive against 32% of Temtop's.
Dark Sky Meter ships an update every 3 months, Temtop every 5 weeks. The most recent releases landed on October 17, 2026 and October 8, 2026 respectively.
| Parameter | Dark Sky Meter | Temtop |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 3.8 (6 ratings) — better | 2.9 (80 ratings) |
| Positive reviews | 40.4% of reviews — better | 32.2% of reviews |
| Number of ratings | 6 | 80 — better |
| Update frequency | Every 3 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.6 | 15 — better |
| Further details — not scored | ||
| Size | 4 MB | 183 MB |
| Age rating | 4+ | 4+ |
| Developer | DDQ | Elitech Technology,Inc. |
Customer experience
Dark Sky Meter
Temtop
In-app purchases
Dark Sky Meter
No in-app purchases
Temtop
No in-app purchases
