# Astro Stacker vs StackArt

The clearest difference is update cadence: StackArt at every 4 days against Astro Stacker's fortnightly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Astro Stacker sells 3 in-app purchases, starting at $12.99 per month and StackArt sells 1 in-app purchase, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Astro Stacker ships an update fortnightly, StackArt every 4 days. The most recent releases landed on October 13, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Astro Stacker | StackArt |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (4 ratings)](https://appshunter.io/ios/app/astro-stacker-star-images/id6753679598/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 4 days** |
| Monetization | Free | — |
| Size | 16 MB | 22 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ahmed Al-Mahmud](https://appshunter.io/developer/1844352476) | [Ufuk Kosker](https://appshunter.io/developer/1571028340) |

## What reviewers say

### Astro Stacker

[App page](https://appshunter.io/ios/app/astro-stacker-star-images/id6753679598)

Transform your smartphone into a powerful astrophotography tool. This app uses advanced algorithms to combine multiple night sky photos, reducing noise and revealing hidden celestial details for professional-quality results.

**Highlights:** Advanced stacking algorithms (Average, Median, Maximum, Minimum), Intelligent and manual image alignment, Real-time processing and progress tracking, On-device processing, no cloud upload, Export high-resolution stacked images, Detailed processing insights and logs

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AstroStacker app | $12.99 | per month |
| AstroStacker app | $99.99 | per year |
| AstroStacker app | $219.00 | one-time |


### StackArt

[App page](https://appshunter.io/ios/app/stackart/id6757735293)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| StackArt Pro | $2.99 | per month |


## Frequently asked questions

### Is Astro Stacker free?

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

### Is StackArt free?

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

### Do Astro Stacker or StackArt have ads?

Neither Astro Stacker nor StackArt shows ads.

### Which is updated more often, Astro Stacker or StackArt?

Astro Stacker ships an update fortnightly, and StackArt every 4 days. Most recently, Astro Stacker was updated on October 13, 2026 and StackArt on October 6, 2026.

---

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