# FITS QuickLook Mobile — Not just a FITS viewer

> Lightweight and efficient FITS image viewer for mobile devices. (iPhone/iPad app by 海平 陈.)

- Source: https://appshunter.io/ios/app/fits-quicklook-mobile/id6757133145 (this page in markdown: same URL + `.md`)
- Developer: [海平 陈](https://appshunter.io/developer/1849550162)
- Category: Productivity, Utilities
- Price: $1.99 (on sale, was $2.29)
- Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.0 · 70 MB
- Languages: American English, Arabic, Dutch, French (France), German (Germany), Italian, Japanese, Korean, European Portuguese, Chinese (Simplified, China) and 1 more
- Released: 2026-01-08
- Data updated: 2026-09-04
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/fits-quicklook-mobile/id6757133145/reviews.md

## What is FITS QuickLook Mobile?

FITS QuickLook Mobile is a lightweight and efficient viewer for FITS images, designed for mobile devices.
Built upon the macOS version and optimized for touch, it delivers a smooth and intuitive experience on both iPhone and iPad.
On smaller screens, it focuses on fast single-image viewing; on iPad, it supports opening multiple FITS files in separate windows for convenient side-by-side comparison.
Supports standard FITS formats (.fit, .fits), compatible with both astronomical data and FITS files generated by tools such as MATLAB.
Enables precise exploration of image data using touch or Apple Pencil.
Fully offline. No accounts required. No data collection.

## Key features

- Lightweight FITS image viewer
- Optimized for touch on iPhone and iPad
- Side-by-side comparison on iPad
- Precise image data exploration
- Supports standard FITS formats
- Fully offline functionality

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/fits-quicklook-mobile/id6757133145/reviews.md

### 5/5 — Although it is a minority, it is not bad

*2026-01-10*

Although it is a minority, it is not bad.

## Frequently asked questions about FITS QuickLook Mobile

### What is FITS QuickLook Mobile?

FITS QuickLook Mobile is a lightweight and efficient viewer for FITS images, designed for mobile devices. It offers intuitive touch controls and offline functionality.

### What devices does FITS QuickLook Mobile support?

FITS QuickLook Mobile is available for both iPhone and iPad, offering optimized experiences for each screen size.

### Can I compare FITS files side-by-side with FITS QuickLook Mobile?

Yes, on iPad, FITS QuickLook Mobile supports opening multiple FITS files in separate windows for convenient side-by-side comparison.

### Does FITS QuickLook Mobile require an internet connection?

No, FITS QuickLook Mobile is fully offline and does not require an internet connection to function.

### What FITS formats does FITS QuickLook Mobile support?

FITS QuickLook Mobile supports standard FITS formats (.fit, .fits), compatible with astronomical data and files generated by tools like MATLAB.

### How much does FITS QuickLook Mobile cost?

FITS QuickLook Mobile is a paid application, priced at $1.99.

### Does FITS QuickLook Mobile collect user data?

No, FITS QuickLook Mobile does not require accounts and explicitly states that it does not collect any user data.

### How often is FITS QuickLook Mobile updated?

The latest version, 6.2.15, was released on May 6, 2026, indicating recent development activity and ongoing support.

## Version history (last 5 releases)

### 8.1.3 — 2026-08-27

• Fixed an issue where files could not be selected in Distortion Correction.
• Fixed several localization issues.
• Added file transfer between iOS and Mac.

### 8.1.2 — 2026-08-22

• Improved matrix summation with a clearer multi-row and multi-column workflow.
• Fixed unclear result displays when selecting multiple columns.
• Improved summation indicators to clearly show whether row or column summation is being performed.
• Enhanced the matrix analysis workflow for a smoother data processing experience.
• Additional stability and interface improvements.

### 8.1.1 — 2026-08-21

• Fixed an issue where the title bar could disappear.
• Fixed an issue where the minimum value was incorrectly set to 0 when maximum value suppression was enabled.
• Redesigned the Stretch interface with an improved workflow.
• Added more Stretch controls for more flexible image visualization.
• Additional stability and interface improvements.

### 8.0.0 — 2026-08-20

• Redesigned FITS analysis workflows while preserving existing functionality, with improved distortion correction and noise analysis experiences.
• Reimagined selection, stretch, distortion correction, and noise tools with a more intuitive and efficient workflow.
• Introduced a new multi-function interface system for smoother switching between analysis tools.
• Redesigned the iPhone home experience for improved mobile browsing and analysis.
• Added Apple accessibility support for a more inclusive FITS data experience.
• VoiceOver now describes image dimensions, zoom level, data range, and selection information.
• Added spoken image summaries using the system language.
• Improved accessibility support with enhanced contrast, non-color indicators, and transparency adjustments.
• Added Pixel Explorer with coordinate navigation, ADU values, VoiceOver actions, and optional haptic feedback.
• Improved iPad interaction and large-screen workflows.
• Improved update checking to notify users only when a new version is available.
• Additional stability and performance improvements.

### 7.3.8 — 2026-08-19

• Enhanced matrix operations with support for rotating matrix elements.
• Fixed issues where some interface text could be displayed incompletely.
• Improved Colorbar visualization with labels for clearer data interpretation.
• Additional stability and interface improvements.

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## More apps by 海平 陈

- [MarkdownLite Editor](https://appshunter.io/ios/app/markdownlite-editor/id6757002091)
- [FITS QuickGuide](https://appshunter.io/ios/app/fits-quickguide/id6767085896)

All apps by 海平 陈: https://appshunter.io/developer/1849550162

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-04.*