# ASGuide vs Astro

The clearest difference is review sentiment: ASGuide at 100% against Astro's 50%. ASGuide also leads on in-app purchases (none vs 2). Astro's advantage is update cadence (every 6 weeks vs every 4 months) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. Astro sells 2 in-app purchases, starting at $2.99 per month. ASGuide asks for nothing beyond the download.

ASGuide ships an update every 4 months, Astro every 6 weeks. Both last shipped on October 24, 2026.

## The numbers

| Metric | ASGuide | Astro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (9 ratings)](https://appshunter.io/ios/app/asguide/id1500363899/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | **100.0% of reviews** | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 6 weeks** |
| Monetization | **Free** | Freemium |
| Size | 33 MB | 95 MB |
| Requires iOS | 18.0 | **15.6** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Philip Perez](https://appshunter.io/developer/1500363898) | [Fabian Schussler](https://appshunter.io/developer/1568473892) |

## What reviewers say

### ASGuide

[App page](https://appshunter.io/ios/app/asguide/id1500363899)

Explore the night sky with this astronomy companion. Discover planets, galaxies, nebulae, and more visible from your location. Generate custom viewing lists and preview celestial objects with an interactive sky atlas.

**Highlights:** Discover celestial objects visible from your location, Generate custom viewing lists, View detailed observation information, Interactive sky atlas preview, Dark mode for nighttime viewing, Sunrise/sunset and moon phase dashboard

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

**In-app purchases:** none


### Astro

[App page](https://appshunter.io/ios/app/astro-colibri/id1576668763)

This app provides real-time alerts and multi-wavelength context for astronomical events. It offers advanced planning tools, interactive sky maps, and data enrichment for professional researchers and citizen scientists.

**Highlights:** Real-time astronomical event alerts, Multi-wavelength observational context, Advanced observing condition planning, Interactive sky map visualization, Real-time photometry and lightcurve data, Pro-amateur astronomer collaboration tools

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Astro-COLIBRI AR | $2.99 | per month |
| Astro-COLIBRI AR | $29.99 | per year |


## Frequently asked questions

### Is ASGuide free?

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

### Is Astro free?

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

### Do ASGuide or Astro have ads?

Neither ASGuide nor Astro shows ads.

### Which is updated more often, ASGuide or Astro?

ASGuide ships an update every 4 months, and Astro every 6 weeks. Most recently, ASGuide was updated on October 24, 2026 and Astro on October 24, 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.*