# ASIAIR vs AstroFileViewer

The clearest difference is review sentiment: AstroFileViewer at 100% against ASIAIR's 52%. AstroFileViewer also leads on rating (5.0 vs 3.9) and update cadence (every 11 days vs every 2 months). ASIAIR's advantage is ratings volume (245 vs 2) and iOS requirement (13.0 vs 16.4). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

AstroFileViewer holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: ASIAIR has 245 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 52% of ASIAIR's written reviews are positive against 100% of AstroFileViewer's.

ASIAIR ships an update every 2 months, AstroFileViewer every 11 days. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | ASIAIR | AstroFileViewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (245 ratings)](https://appshunter.io/ios/app/asiair/id1367782034/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/astrofileviewer/id6760240080/reviews)** |
| Number of ratings | **245** | 2 |
| Positive reviews | 52.3% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 11 days** |
| Monetization | Free | Free |
| Size | 1.1 GB | 1 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [SuZhou ZWO Co., Ltd](https://appshunter.io/developer/1367782033) | [Joerg Klaas](https://appshunter.io/developer/1879846001) |

## What reviewers say

### ASIAIR

[App page](https://appshunter.io/ios/app/asiair/id1367782034)

This app acts as an intelligent wireless controller for astrophotography, enabling control of various cameras and equatorial mounts. It offers comprehensive tools for deep-sky and planetary imaging, including focusing, alignment, and stacking, all accessible from your mobile device.

**Highlights:** Wireless camera and mount control, DSLR/MILC and equatorial mount support, Built-in SkyAtlas for imaging tasks, Auto-focus and polar alignment, Live stacking and post-stacking, Multi-target and mosaic planning

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Powerful and feature-rich
- 👍 Easy to use and intuitive
- 🔒 Reliable and stable
- 🌟 Excellent automation and control
- 💻 Seamless integration with ZWO ecosystem

**What reviewers complain about**

- 🐛 Buggy software updates
- 🔍 Limited camera/mount compatibility
- 🔧 Difficult to troubleshoot issues
- 🔋 Connectivity and Wi-Fi problems
- 🗺️ Inaccurate object locating and plate solving

**Reported bugs**

- Crashes and freezes with recent updates
- Guiding and tracking issues after updates
- Connectivity problems with certain mounts
- Polar alignment and plate solving failures
- Incompatibility with newer iOS versions

**Requested features**

- Improved object catalog and sky atlas
- Support for more camera brands and models
- Mosaic imaging capabilities
- Customizable file naming and organization
- Notifications and alerts for issues during sessions


### 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


## Frequently asked questions

### Is ASIAIR free?

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

### Is AstroFileViewer free?

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

### Which has better reviews, ASIAIR or AstroFileViewer?

AstroFileViewer is rated higher. ASIAIR averages 3.9 out of 5 from 245 ratings, while AstroFileViewer averages 5.0 from 2 ratings.

### Do ASIAIR or AstroFileViewer have ads?

Neither ASIAIR nor AstroFileViewer shows ads.

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

ASIAIR ships an update every 2 months, and AstroFileViewer every 11 days. Most recently, ASIAIR was updated on November 6, 2026 and AstroFileViewer on October 31, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*