# Rock Identifier vs Space Arc

The clearest difference is in-app purchases: Space Arc at none against Rock Identifier's 3. Rock Identifier's advantage is ads (none vs shown) and device support (3 vs 1). On price there is nothing between them.

Both are free to download. Rock Identifier sells 3 in-app purchases, starting at $4.99 per 7 days. Space Arc asks for nothing beyond the download.

## The numbers

| Metric | Rock Identifier | Space Arc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/space-arc/id6759466047/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | — | Monthly |
| Monetization | — | Ad-supported |
| Size | 37 MB | 7 MB |
| Requires iOS | **15.1** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Keekly Tech Inc.](https://appshunter.io/developer/1803252792) | [Marc L. Melcher](https://appshunter.io/developer/371961192) |

## What reviewers say

### Rock Identifier

[App page](https://appshunter.io/ios/app/rock-identifier-rockquest/id6747198822)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Plan | $4.99 | per 7 days |
| Yearly Plan | $24.99 | per year |
| Lifetime | $29.99 | one-time |


### Space Arc

[App page](https://appshunter.io/ios/app/space-arc/id6759466047)

Explore celestial events with real-time data from NASA and other space agencies. Track satellites, view stunning astronomy pictures, and get personalized alerts for meteor showers, eclipses, and aurora.

**Highlights:** Real-time satellite tracking, NASA Picture of the Day, Global launch calendar, Celestial events calendar, Aurora alerts, Smart notifications, Offline event caching

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Rock Identifier free?

Rock Identifier is free to download, with in-app purchases available.

### Is Space Arc free?

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

### Do Rock Identifier or Space Arc have ads?

Space Arc shows ads; Rock Identifier does not.

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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.*