# AI CometStack vs AstroPile

The clearest difference is iOS requirement: AstroPile at 15.0 against AI CometStack's 17.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. AI CometStack sells 1 in-app purchase, starting at $9.99 per year and AstroPile sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | AI CometStack | AstroPile |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Size | 105 MB | 20 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [yong chong loh](https://appshunter.io/developer/393466709) | [tao wen](https://appshunter.io/developer/949878814) |

## What reviewers say

### AI CometStack

[App page](https://appshunter.io/ios/app/ai-cometstack-comet-stacking/id6770419588)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Yearly Subscription | $9.99 | per year |


### AstroPile

[App page](https://appshunter.io/ios/app/astropile-astro-image-stacker/id6811097582)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AstroPile Pro | $3.99 | one-time |


## Frequently asked questions

### Is AI CometStack free?

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

### Is AstroPile free?

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

### Do AI CometStack or AstroPile have ads?

Neither AI CometStack nor AstroPile shows ads.

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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.*