# Temtop vs SkyAtlas

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.

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.

## The numbers

| Metric | Temtop | SkyAtlas |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.9 (82 ratings)](https://appshunter.io/ios/app/temtop/id1439409326/reviews)** | [2.4 (17 ratings)](https://appshunter.io/ios/app/skyatlas/id1616449238/reviews) |
| Number of ratings | **82** | 17 |
| Positive reviews | 32.2% of reviews | **40.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Monthly** |
| Monetization | Free | Free |
| Size | 183 MB | 911 MB |
| Requires iOS | 15 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Elitech Technology,Inc.](https://appshunter.io/developer/1455057713) | [SuZhou ZWO Co., Ltd](https://appshunter.io/developer/1367782033) |

## What reviewers say

### Temtop

[App page](https://appshunter.io/ios/app/temtop/id1439409326)

This app detects formaldehyde, PM2.5, and TVOC using advanced sensors. It provides accurate and reliable environmental data for your home or workspace.

**Highlights:** Formaldehyde detection, PM2.5 detection, TVOC detection, British Dart electrochemical sensor, US TEMTOP laser particle sensor, Accurate and reliable data

**Features:** Vision Pro support

**In-app purchases:** none


### SkyAtlas

[App page](https://appshunter.io/ios/app/skyatlas/id1616449238)

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.

**Highlights:** 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

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

**In-app purchases:** none


## Frequently asked questions

### Is Temtop free?

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

### Is SkyAtlas free?

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

### Which has better reviews, Temtop or SkyAtlas?

Temtop is rated higher. Temtop averages 2.9 out of 5 from 82 ratings, while SkyAtlas averages 2.4 from 17 ratings.

### Do Temtop or SkyAtlas have ads?

Neither Temtop nor SkyAtlas shows ads.

### Which is updated more often, Temtop or SkyAtlas?

Temtop ships an update every 5 weeks, and SkyAtlas monthly. Most recently, Temtop was updated on October 24, 2026 and SkyAtlas on October 24, 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.*