# Star Guide vs Astrarium Sky Map

The clearest difference is iOS requirement: Star Guide at 15.5 against Astrarium Sky Map's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Star Guide sells 4 in-app purchases, starting at $1.99 per 7 days and Astrarium Sky Map sells 5 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Star Guide ships an update every 2 weeks, Astrarium Sky Map every 3 weeks. The most recent releases landed on November 7, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | Star Guide | Astrarium Sky Map |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (4.4K ratings)](https://appshunter.io/ios/app/star-guide-night-sky-map/id1542535191/reviews)** | — |
| Number of ratings | **4.4K** | — |
| Positive reviews | 27.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 220 MB | 197 MB |
| Requires iOS | **15.5** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | +4 |
| Developer | [Star register](https://appshunter.io/developer/1542535193) | [Nhan Tran](https://appshunter.io/developer/1796345687) |

## What reviewers say

### Star Guide

[App page](https://appshunter.io/ios/app/star-guide-night-sky-map/id1542535191)

Explore the night sky in real-time with this interactive planetarium. Identify stars and planets, visualize celestial objects in 3D, and plan your stargazing sessions with time travel and location previews.

**Highlights:** Real-time planetarium view, Augmented Reality mode, 3D stars and planets, Best viewing time notifications, Sky motion preview, Past and future sky time travel, Location-based sky preview

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $1.99 | per 7 days |
| Star-Registration Premium | $4.99 | per month |
| Annually | $29.99 | per year |
| One time | $24.99 | one-time |


### Astrarium Sky Map

[App page](https://appshunter.io/ios/app/astrarium-sky-map/id6785950209)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $1.99 | per 7 days |
| Weekly | $3.99 | per 7 days |
| Yearly | $14.99 | per year |
| Remove ads | $5.99 | one-time |
| Onetime | $34.99 | one-time |


## Frequently asked questions

### Is Star Guide free?

Star Guide is free to download, with in-app purchases available.

### Is Astrarium Sky Map free?

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

### Do Star Guide or Astrarium Sky Map have ads?

Neither Star Guide nor Astrarium Sky Map shows ads.

### Which is updated more often, Star Guide or Astrarium Sky Map?

Star Guide ships an update every 2 weeks, and Astrarium Sky Map every 3 weeks. Most recently, Star Guide was updated on November 7, 2026 and Astrarium Sky Map on November 1, 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.*