# AI CometStack vs Nightfall Atlas

The clearest difference is in-app purchases: Nightfall Atlas at none against AI CometStack's 1. Nightfall Atlas also leads on iOS requirement (15.0 vs 17.0). On price, ads 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. Nightfall Atlas asks for nothing beyond the download.

## The numbers

| Metric | AI CometStack | Nightfall Atlas |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/nightfall-atlas/id6787785856/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | — | Every 3 days |
| Monetization | — | Free |
| Size | 105 MB | 36 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [yong chong loh](https://appshunter.io/developer/393466709) | [Builder of Things Studio LLC](https://appshunter.io/developer/6787785858) |

## 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 |


### Nightfall Atlas

[App page](https://appshunter.io/ios/app/nightfall-atlas/id6787785856)

Plan your next astrophotography session with equipment-aware recommendations, observing conditions, and a camera-based sky preview. Scout targets, check field risks like weather and obstructions, and receive alerts for optimal imaging windows. Spend less time guessing and more time capturing the night sky.

**Highlights:** Equipment-aware target recommendations, Observing conditions and field risk analysis, Camera-based sky preview (Scout), Nightly and weekly planning, Target path and visibility tracking, Native alerts and calendar integration, Offline target path calculation

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

**In-app purchases:** none


## Frequently asked questions

### Is AI CometStack free?

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

### Is Nightfall Atlas free?

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

### Do AI CometStack or Nightfall Atlas have ads?

Neither AI CometStack nor Nightfall Atlas 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.*