# AsterScope vs Sky Map

The clearest difference is price: Sky Map at Free against AsterScope's $3.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

Sky Map is free to download; AsterScope costs $3.99 up front. AsterScope sells 2 one-off in-app purchases and Sky Map sells 3 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

AsterScope ships an update monthly, Sky Map every 5 weeks. The most recent releases landed on September 29, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | AsterScope | Sky Map |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/sky-map-star-tracker/id6762576507/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 5 weeks |
| Monetization | — | Freemium |
| Size | 12 MB | 13 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [红斌 戚](https://appshunter.io/developer/1854607141) | [Nguyen Anh](https://appshunter.io/developer/882187560) |

## What reviewers say

### AsterScope

[App page](https://appshunter.io/ios/app/asterscope/id6762000638)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Catalog Upgrade | $4.99 | one-time |
| Ad-Free Catalog Upgrade | $7.99 | one-time |


### Sky Map

[App page](https://appshunter.io/ios/app/sky-map-star-tracker/id6762576507)

Identify stars, constellations, planets, and satellites in real time by pointing your device at the sky. Explore celestial objects, track satellites, and discover what's visible tonight with AR overlays and time travel features.

**Highlights:** Real-time sky tracking with AR, Instant object identification, Augmented reality overlays, Time travel sky view, Satellite tracking (ISS), Tonight's sky highlights, Night mode (red-light filter)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sky Map Premium Monthly | $7.99 | per month |
| Sky Map Premium Yearly | $34.99 | per year |
| Sky Map Premium Lifetime | $49.99 | one-time |


## Frequently asked questions

### Is AsterScope free?

AsterScope costs $3.99, and also offers in-app purchases.

### Is Sky Map free?

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

### Do AsterScope or Sky Map have ads?

Neither AsterScope nor Sky Map shows ads.

### Which is updated more often, AsterScope or Sky Map?

AsterScope ships an update monthly, and Sky Map every 5 weeks. Most recently, AsterScope was updated on September 29, 2026 and Sky Map on October 12, 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.*