# AstroFileViewer vs Astrowetter

The clearest difference is price: AstroFileViewer at Free against Astrowetter's $2.99. AstroFileViewer also leads on iOS requirement (16.4 vs 26.5). On review sentiment, update cadence, ads and in-app purchases there is nothing between them.

AstroFileViewer is free to download; Astrowetter costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

AstroFileViewer ships an update every 11 days, Astrowetter every 10 days. The most recent releases landed on October 24, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | AstroFileViewer | Astrowetter |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/astrofileviewer/id6760240080/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 days | **Every 10 days** |
| Monetization | **Free** | Paid |
| Size | 1 MB | 9 MB |
| Requires iOS | **16.4** | 26.5 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Joerg Klaas](https://appshunter.io/developer/1879846001) | [Frank Deubert](https://appshunter.io/developer/6799527185) |

## 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


### Astrowetter

[App page](https://appshunter.io/ios/app/astrowetter/id6814862249)

This app provides a consolidated weather forecast specifically for stargazing and astrophotography. It integrates data from multiple weather models to offer a clear score, time window, and confidence level for observing conditions, including cloud cover, seeing, and moon phase.

**Highlights:** Multiple weather model integration, Observing score and time window, Cloud cover forecast, Seeing and dew point estimation, Moon phase and light pollution data, ISS and planet pass tracking, Astrophotography shooting tips

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

**In-app purchases:** none


## Frequently asked questions

### Is AstroFileViewer free?

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

### Is Astrowetter free?

Astrowetter costs $2.99, with no in-app purchases.

### Do AstroFileViewer or Astrowetter have ads?

Neither AstroFileViewer nor Astrowetter shows ads.

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

AstroFileViewer ships an update every 11 days, and Astrowetter every 10 days. Most recently, AstroFileViewer was updated on October 24, 2026 and Astrowetter on October 26, 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.*