# AstroFITS vs Nebulis

The clearest difference is price: AstroFITS at Free against Nebulis's $4.99. Nebulis's advantage is in-app purchases (none vs 1) and update cadence (every 2 weeks vs monthly). On ads, device support and iOS requirement there is nothing between them.

AstroFITS is free to download; Nebulis costs $4.99 up front. AstroFITS sells 1 in-app purchase, starting at $0.99 per year. Nebulis asks for nothing beyond the download.

AstroFITS ships an update monthly, Nebulis every 2 weeks. The most recent releases landed on October 8, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | AstroFITS | Nebulis |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[2.0 (1 ratings)](https://appshunter.io/ios/app/astrofits/id6756322104/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 61 MB | 15 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Apple TV** |
| Age rating | 4+ | 4+ |
| Developer | [yong chong loh](https://appshunter.io/developer/393466709) | [Brentley Catoe](https://appshunter.io/developer/1883550513) |

## What reviewers say

### AstroFITS

[App page](https://appshunter.io/ios/app/astrofits/id6756322104)

This app allows users to quickly open and view FITS files on iOS devices using GPU acceleration. It features automatic image stretching and supports various color formats and bit depths, making astronomical image analysis more accessible.

**Highlights:** Open FITS files quickly on iOS, GPU accelerated image processing, Automatic image stretching, Supports RGB and gray color, Handles multiple BITPIX formats, Save adjusted images to Photos

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Yearly Subscription | $0.99 | per year |


### Nebulis

[App page](https://appshunter.io/ios/app/nebulis/id6769902885)

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

**In-app purchases:** none


## Frequently asked questions

### Is AstroFITS free?

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

### Is Nebulis free?

Nebulis costs $4.99, with no in-app purchases.

### Do AstroFITS or Nebulis have ads?

Neither AstroFITS nor Nebulis shows ads.

### Which is updated more often, AstroFITS or Nebulis?

AstroFITS ships an update monthly, and Nebulis every 2 weeks. Most recently, AstroFITS was updated on October 8, 2026 and Nebulis on October 17, 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.*