# AstroFileViewer vs AstroPlan

The clearest difference is in-app purchases: AstroFileViewer at none against AstroPlan's 4. AstroPlan's advantage is update cadence (every 4 days vs every 11 days). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. AstroPlan sells 4 in-app purchases, starting at $4.99 per month. AstroFileViewer asks for nothing beyond the download.

AstroFileViewer ships an update every 11 days, AstroPlan every 4 days. The most recent releases landed on October 6, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | AstroFileViewer | AstroPlan |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/astrofileviewer/id6760240080/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 11 days | **Every 4 days** |
| Monetization | Free | — |
| Size | 1 MB | 40 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Joerg Klaas](https://appshunter.io/developer/1879846001) | [Martin Wilcox](https://appshunter.io/developer/6774190373) |

## What reviewers say

### AstroFileViewer

[App page](https://appshunter.io/ios/app/astrofileviewer/id6760240080)

View astronomical image files like FITS and XISF on your iPhone or iPad. Get an early impression of your data with PixInsight-compatible auto-stretching, gradient control, and noise reduction. Fun and useful for astrophotographers.

**Highlights:** Open FITS and XISF files from various sources, PixInsight-compatible STF auto-stretch, Mono and RGB image support with OSC debayer, Dark point and contrast sliders, Color saturation adjustment, GPU bilateral denoise, Gradient correction

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

**In-app purchases:** none


### AstroPlan

[App page](https://appshunter.io/ios/app/astroplan/id6774190371)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AstroPlan Pro Monthly | $4.99 | per month |
| AstroPlan Pro AI Monthly | $9.99 | per month |
| AstroPlan Pro Yearly | $39.99 | per year |
| AstroPlan Pro AI Yearly | $79.99 | per year |


## Frequently asked questions

### Is AstroFileViewer free?

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

### Is AstroPlan free?

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

### Do AstroFileViewer or AstroPlan have ads?

Neither AstroFileViewer nor AstroPlan shows ads.

### Which is updated more often, AstroFileViewer or AstroPlan?

AstroFileViewer ships an update every 11 days, and AstroPlan every 4 days. Most recently, AstroFileViewer was updated on October 6, 2026 and AstroPlan on September 25, 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.*