# PixADair vs SharpStacker

The clearest difference is update cadence: PixADair at every 2 days against SharpStacker's fortnightly. SharpStacker's advantage is iOS requirement (18.6 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

PixADair ships an update every 2 days, SharpStacker fortnightly. Both last shipped on October 31, 2026.

## The numbers

| Metric | PixADair | SharpStacker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/sharpstacker/id6783673108/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 days** | Fortnightly |
| Monetization | — | Free |
| Size | 16 MB | 17 MB |
| Requires iOS | 26.0 | **18.6** |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Jonathan Adair](https://appshunter.io/developer/1868064149) | [LUIGI VANNOZZI](https://appshunter.io/developer/6783673110) |

## What reviewers say

### PixADair

[App page](https://appshunter.io/ios/app/pixadair-ai-astrophoto-tools/id6762082820)

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

**In-app purchases:** none


### SharpStacker

[App page](https://appshunter.io/ios/app/sharpstacker/id6783673108)

This app simplifies astrophotography by stacking multiple night sky exposures into a single detailed image. It automatically aligns and combines your shots to reduce noise and enhance faint celestial objects, offering an intuitive workflow without complex desktop software.

**Highlights:** Automatic star alignment and stacking, Noise reduction through stacking, Machine-learning generated mask, Manual mask editing, Full RAW import and export, On-device processing

**In-app purchases:** none


## Frequently asked questions

### Is PixADair free?

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

### Is SharpStacker free?

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

### Do PixADair or SharpStacker have ads?

Neither PixADair nor SharpStacker shows ads.

### Which is updated more often, PixADair or SharpStacker?

PixADair ships an update every 2 days, and SharpStacker fortnightly. Most recently, PixADair was updated on October 31, 2026 and SharpStacker on October 31, 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.*