# SkyAtlas vs QUARCS

The clearest difference is rating: QUARCS at 3.0 against SkyAtlas's 2.4. SkyAtlas's advantage is review sentiment (40% vs 0%) and update cadence (monthly vs every 6 months). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

QUARCS holds the better App Store score, 3.0 against 2.4. That said, the two scores are not equally well evidenced: SkyAtlas has 17 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 40% of SkyAtlas's written reviews are positive against 0% of QUARCS's, so the app with the better star average is not the one people write more warmly about.

SkyAtlas ships an update monthly, QUARCS every 6 months. The most recent releases landed on October 24, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | SkyAtlas | QUARCS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.4 (17 ratings)](https://appshunter.io/ios/app/skyatlas/id1616449238/reviews) | **[3.0 (1 ratings)](https://appshunter.io/ios/app/quarcs/id6479396546/reviews)** |
| Number of ratings | **17** | 1 |
| Positive reviews | **40.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 6 months |
| Monetization | Free | Free |
| Size | 911 MB | 30 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SuZhou ZWO Co., Ltd](https://appshunter.io/developer/1367782033) | [Light Speed Vision(Beijing) Co., Ltd](https://appshunter.io/developer/1511662353) |

## What reviewers say

### 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


### QUARCS

[App page](https://appshunter.io/ios/app/quarcs/id6479396546)

This open-source software kit enables remote astrophotography capture via Wi-Fi and computer. It offers comprehensive control over telescope mounts, cameras, autoguiding, and electric focusers, integrating with Stellarium for sky mapping.

**Highlights:** Remote capture via Wi-Fi, Computer remote capture via LAN, Mount control, Camera control, Autoguiding, Electric focuser control, Stellarium skymap integration

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SkyAtlas free?

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

### Is QUARCS free?

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

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

QUARCS is rated higher. SkyAtlas averages 2.4 out of 5 from 17 ratings, while QUARCS averages 3.0 from 1 ratings.

### Do SkyAtlas or QUARCS have ads?

Neither SkyAtlas nor QUARCS shows ads.

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

SkyAtlas ships an update monthly, and QUARCS every 6 months. Most recently, SkyAtlas was updated on October 24, 2026 and QUARCS on October 6, 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.*