# ARC Space vs Stellar Catalogue

The clearest difference is in-app purchases: ARC Space at none against Stellar Catalogue's 4. ARC Space also leads on iOS requirement (12.0 vs 15.0). Stellar Catalogue's advantage is update cadence (every 2 weeks vs every 11 months). On price, ads and device support there is nothing between them.

Both are free to download. Stellar Catalogue sells 4 in-app purchases, starting at $2.49 per month. ARC Space asks for nothing beyond the download.

ARC Space ships an update every 11 months, Stellar Catalogue every 2 weeks. The most recent releases landed on September 28, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | ARC Space | Stellar Catalogue |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 2 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 196 MB | 169 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CleverBooks Limited](https://appshunter.io/developer/1308199195) | [Diego Campagnaro](https://appshunter.io/developer/1603976167) |

## What reviewers say

### ARC Space

[App page](https://appshunter.io/ios/app/arc-space/id1602392311)

**Features:** macOS Compatibility

**In-app purchases:** none


### Stellar Catalogue

[App page](https://appshunter.io/ios/app/stellar-catalogue/id1603976015)

Discover celestial objects visible in the night sky in real-time based on your location. Plan your observations with custom locations, simulate dates, and manage your optical equipment. Save favorite objects and lists for quick access.

**Highlights:** Real-time sky observation guide, Object discovery by location, Skyview navigation mode, Custom observation planning, Optical equipment setup, Personalized object lists

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly subscription | $2.49 | per month |
| Six months subscription | $11.49 | per 6 months |
| Annual Subscription | $23.49 | per year |
| PRO Version | $12.99 | one-time |


## Frequently asked questions

### Is ARC Space free?

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

### Is Stellar Catalogue free?

Stellar Catalogue is free to download, with in-app purchases available.

### Do ARC Space or Stellar Catalogue have ads?

Neither ARC Space nor Stellar Catalogue shows ads.

### Which is updated more often, ARC Space or Stellar Catalogue?

ARC Space ships an update every 11 months, and Stellar Catalogue every 2 weeks. Most recently, ARC Space was updated on September 28, 2026 and Stellar Catalogue on October 14, 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.*