Temtop vs SkyAtlas
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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
Read full descriptionHide full description
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
SkyAtlas
Explore the night sky with a digital atlas and control your telescope mount. Plan astrophotography compositions with simulated camera fields of view and track celestial objects in real-time. Features one-click GoTo and mode switching for an enhanced stargazing experience.
- Digital sky atlas exploration
- Telescope mount control (ZWO ASI)
- Simulated camera field of view
- Real-time telescope pointing display
- One-click GoTo functionality
- Object tracking
- EQ and AltAz mode switching
Read full descriptionHide full description
SkyAtlas is the control app for ZWO AM series mounts, with Bluetooth support for ZWO EAF. Use your phone to control the mount and focuser with ease. The built-in star map includes thousands of stars and deep-sky objects. "Best Tonight" recommends the best targets in your current sky. Tap GoTo, and the mount automatically tracks your chosen object. Preview your telescope's aim and frame shots right on your screen—what you see is where it points. Switch between equatorial and alt-az modes with one tap. SkyAtlas, explore the night sky, simplified.
Screenshots
Verdict
The clearest difference is rating: Temtop at 2.9 against SkyAtlas's 2.4. Temtop also leads on ratings volume (82 vs 17). SkyAtlas's advantage is iOS requirement (11.0 vs 15). On price, review sentiment, update cadence and ads 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Temtop holds the better App Store score, 2.9 against 2.4. Both are backed by a comparable volume of ratings — 82 and 17 respectively. Written reviews complicate that: 32% of Temtop's written reviews are positive against 40% of SkyAtlas's, so the app with the better star average is not the one people write more warmly about.
Temtop ships an update every 5 weeks, SkyAtlas monthly. Both last shipped on October 24, 2026.
| Parameter | Temtop | SkyAtlas |
|---|---|---|
| Price | Free | Free |
| Rating | 2.9 (82 ratings) — better | 2.4 (17 ratings) |
| Positive reviews | 32.2% of reviews | 40.0% of reviews — better |
| Number of ratings | 82 — better | 17 |
| Update frequency | Every 5 weeks | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15 | 11.0 — better |
| Further details — not scored | ||
| Size | 183 MB | 911 MB |
| Age rating | 4+ | 4+ |
| Developer | Elitech Technology,Inc. | SuZhou ZWO Co., Ltd |
Customer experience
Temtop
SkyAtlas
In-app purchases
Temtop
No in-app purchases
SkyAtlas
No in-app purchases
