# Classic Sky Map 2 vs DataMaster Prep

The clearest difference is iOS requirement: DataMaster Prep at 15.0 against Classic Sky Map 2's 17.6. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Classic Sky Map 2 sells 1 one-off in-app purchase and DataMaster Prep sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Classic Sky Map 2 | DataMaster Prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (9.8K ratings)](https://appshunter.io/ios/app/classic-sky-map-2/id1137455038/reviews)** | — |
| Number of ratings | **9.8K** | — |
| Positive reviews | 75.9% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 16 months | — |
| Monetization | Free with in-app purchases | — |
| Size | 69 MB | 32 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [X04 Studios Inc.](https://appshunter.io/developer/510671181) | [bader alshammari](https://appshunter.io/developer/858126240) |

## What reviewers say

### Classic Sky Map 2

[App page](https://appshunter.io/ios/app/classic-sky-map-2/id1137455038)

Explore the cosmos with an intuitive and beautiful sky map.  Easily identify stars, planets, and constellations by simply pointing your device at the sky.  Track celestial events and understand astronomical movements with time-lapse features.

**Highlights:** Live sky tracking, Interactive earth map, Time-lapse sky simulation, Beautiful constellation art, Celestial object search, Night vision mode

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version | $2.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🚀 Straightforward and not cluttered with ads
- 🌟 Excellent for stargazing and learning about the night sky
- 🌍 Helpful ground references for locating celestial objects
- 🎓 Great educational tool for young astronomers

**What reviewers complain about**

- 🐛 Occasional calibration and alignment issues
- 🔍 Limited information on stars beyond just names
- 🌌 Can't see below the horizon
- 🗺️ Clumsy and unintuitive navigation at times
- 🔍 Small viewing area that makes it hard to see all the stars

**Reported bugs**

- Compass bearing is inaccurate
- Active tracking no longer works
- App becomes unusable after certain updates

**Requested features**

- Add information on comets, meteor showers, and other space events
- Provide an option to only show visible stars
- Improve search functionality to find planets, moons, and other objects not currently in the sky
- Offer a live tracking mode that updates in real-time


### DataMaster Prep

[App page](https://appshunter.io/ios/app/datamaster-prep/id6742799391)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Access | $19.99 | one-time |


## Frequently asked questions

### Is Classic Sky Map 2 free?

Classic Sky Map 2 is free to download, with in-app purchases available.

### Is DataMaster Prep free?

DataMaster Prep is free to download, with in-app purchases available.

### Do Classic Sky Map 2 or DataMaster Prep have ads?

Neither Classic Sky Map 2 nor DataMaster Prep shows ads.

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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.*