# Astro vs StoneBusters

The clearest difference is in-app purchases: StoneBusters at none against Astro's 2. StoneBusters also leads on update cadence (every 2 weeks vs every 6 weeks). On price, ads, device support and iOS requirement there is nothing between them.

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

Astro ships an update every 6 weeks, StoneBusters every 2 weeks. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Astro | StoneBusters |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 2 weeks** |
| Monetization | Freemium | — |
| Size | 95 MB | 55 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Fabian Schussler](https://appshunter.io/developer/1568473892) | [FABRIZIO TOZZI](https://appshunter.io/developer/1804697065) |

## What reviewers say

### 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 |


### StoneBusters

[App page](https://appshunter.io/ios/app/stonebusters/id6743808912)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Astro free?

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

### Is StoneBusters free?

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

### Do Astro or StoneBusters have ads?

Neither Astro nor StoneBusters shows ads.

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

Astro ships an update every 6 weeks, and StoneBusters every 2 weeks. Most recently, Astro was updated on October 24, 2026 and StoneBusters on October 28, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*