FITS QuickLook Mobile
Lightweight FITS image viewer
$1.99 · Designed for iPad. Not verified for macOS.
Fast FITS viewing on mobile, with powerful multi-window comparison on larger screens. Explore your data effortlessly with intuitive touch controls.
FITS QuickLook Mobile is a lightweight viewer for fast inspection of astronomical FITS images on mobile devices. It is adapted from the macOS version of FITS QuickLook and optimized for touch-based interaction.
On smaller screens, the app provides a simple and responsive experience for viewing a single FITS file at a time.
On larger screens, each FITS file can open in its own window, making it convenient to compare multiple images side by side using multi-window workflows.
The app supports common FITS formats (.fit, .fits) and allows users to explore image data using touch or Apple Pencil on iPad.
FITS QuickLook Mobile does not collect, store, or share any personal data.
more In version 5.1.8, I finally had time to resolve issues related to the Dynamic Island.
1.Fixed an issue where Live Activity remained in the Ready state after all tabs were closed.
2.Fixed an issue where UUID-based file names could appear on the Dynamic Island / Lock Screen when using multiple tabs.
3.Fixed an issue where Matrix files could remain stuck in the Opening state on the Dynamic Island / Lock Screen.
4.Improved visual details on the second page of the iPhone onboarding screen.
5.1.8 3d ago
We recommend updating to the latest version.
This update focuses on fixing issues related to the Annotate (Markup) feature:
1.Fixed an issue where Markup disappeared while Annotate mode was still active
2.Fixed an issue where tapping “Done” did not properly exit Annotate mode
3.Improved the show/hide animation of the Markup panel
4.Improved the export pop-up presentation
5.Fixed an issue where annotations persisted across different tab
5.1.5 Mar 25
Meet the all-new Markup experience on iPad.
1. Added iPad Markup (Annotation) feature with Apple Pencil support
2. Added support for Apple Pencil Pro squeeze to quickly open Markup (iPadOS 17.5+)
3. Added draggable Markup panel with color and stroke width controls
4. Added new annotation tools: Pen, Eraser, Undo, and Clear
5. Fixed star icon color (now correctly displayed in yellow)
6. Improved selected tab visual clarity
7. Apple Pencil Pro squeeze requires iPadOS 17.5 or later; Markup is available on all supported versions via the Annotate button
5.1.2 Mar 24
We Enhanced iPad experience with improved interface design
1.Added tab support on iPad for better workflow management
2.Introduced two viewing modes on iPad
3.Expanded Help documentation for easier onboarding
4.Added a new onboarding page (Step 7)
5.Increased maximum zoom level by 100× on both iPhone and iPad
4.5.11 Mar 23
Fixes & Improvements
1.Fixed incorrect filename display on iPad — FITS files now show their original names
2.Fixed issues with opening files in new windows on iPad
3.Minor bug fixes and improvements
4.4.9 Mar 21
We’ve made several improvements to enhance usability and polish the experience:
1.Fixed animation issues in the Tools onboarding flow
2.Improved interaction with highlighted tabs on the main interface
3.Optimized Advanced panel layout and spacing
4.Fine-tuned toolbar positioning for better accessibility
5.Enhanced Live Activity layout on Lock Screen and Dynamic Island
6.Various bug fixes and performance improvements
7.FITS files on iPhone now display their original filenames
4.4.7 Mar 20
1. Added a launch screen animation for both iPhone and iPad
2. Introduced a quick onboarding guide for first-time users
3. Improved iPhone experience: Display and Histogram panels now auto-collapse when opening Tools
4. Added a dedicated “Quick Guide” access on iPad
5. Fixed an issue where some buttons lacked haptic feedback on iPhone
6. Improved overall performance and smoothness
4.3.13 Mar 20
1. On iPhone, when users open or close the Tools panel, the Display / Histogram at the bottom will automatically toggle accordingly.
2. Introduced the Rotate feature on iPad, bringing feature parity between iPhone and iPad.
3. Minor UI refinements and interaction polish for a smoother overall experience.
4.3.1 Mar 19
1. Optimized the iPhone toolbar layout by switching from a vertical expansion to a horizontal scrolling design, improving usability in limited screen space.
2. Added explanations for Advanced panel features in Help, including Pin, Raw/Normal, Δ, CSV, and Clear, making them easier to understand and use.
3. Refined visual appearance by adjusting toolbar background transparency and layering for a cleaner look over high-contrast images.
4. Advanced features previously available on iPad are now fully supported on iPhone, providing a consistent and more powerful experience.
5. Logic improvement: enabling Advanced will now automatically activate Crosshair, ensuring a smoother analysis workflow.
4.2.2 Mar 18
For iPhone and iPad :
Added double-tap zoom to quickly inspect image details.
For iPhone only：
1.Improved the Help documentation on iPhone.
2.Added haptic feedback to buttons for clearer interaction feedback.
4.2.1 Mar 17
A New Era for FITS QuickLook Mobile
We’ve introduced more powerful features to the iPhone version of the app in this major update.
1. Redesigned the main interface to unify the visual design across iPhone and iPad.
2. Updated the app icon and introduced a Dark Mode variant.
3. File import and Ready status are now available on the Lock Screen and Dynamic Island.
4. Improved rendering performance when browsing multiple images on iPhone.
5. Added star and close controls to tabs for multiple FITS files on iPhone.
6. Added back navigation for tabs when multiple FITS files are open on iPhone.
7. Tabs now support color highlighting: green for BinTable and blue for 2D FITS files.
8. Closing a tab now returns to the previous FITS file view, with improved rendering speed.
9. Expanded the Help documentation for the iPhone version.
10. Added a Home button to the iPhone version for quick access to the main screen.
11. Major UI improvements for iPhone, including redesigned layouts, added tips, and reorganized controls.
12. Crosshair and Profile Panel features are now available on the iPhone version of the app.
13. Added a new rotation feature on iPhone, allowing users to rotate images.
14. Function buttons on iPhone and iPad are now organized in a collapsible Tools menu.
4.1.14 Mar 16
We Improved iPhone experience in Version 3.1.10
Added a Rotate button to quickly adjust image orientation on iPhone
Added Opened Files history on iPhone — easily switch between previously opened files with a scrollable tab bar and highlighted current file
Minor UI improvements and stability enhancements
3.1.10 Mar 14
iPhone: Added a new “Check for Updates” feature
iPad: Fixed a bug that could cause the loading screen to freeze when cancelling FITS file selection
iPhone & iPad: Matrix visualization now supports panning and zooming
3.1.7 Mar 11
For iPad and iPhone：
Introduced BINTABLE (table-based FITS) browsing, distinct from 2D image FITS
Column-based X–Y plotting (Line / Scatter)
Flexible CSV export options
UI refinements for iPhone and iPad
Performance improvements for large datasets
3.1.4 Feb 19
Lowered the minimum iOS system requirement from iOS 17.6 to iOS 17.0
Updated the app icon
Fixed an issue where FITS files exported from the macOS version could not be opened on iOS
(added support for additional FITS file formats)
2.2.2 Jan 21
For iPad and iPhone：
Added version information display
For iPad only:
Added reset functionality for the Profile Advanced panel
Updated Help content
2.2.1 Jan 9
Meet our biggest update ever.
For iPad：
1.Added crosshair functionality
2.Added a movable Profile panel
3.Added a Lock feature to freeze the current selection
4.Added an Advanced panel providing advanced features; the panel can be zoomed and moved
5.Added a Pin feature allowing users to select a specific row or column fiber for image inspection
6.Pin feature now supports multiple row/column selection
7.Added a Clear function to remove all pinned row/column selections with one click
8.Added CSV export support to export selected rows/columns as CSV files
9.Added a difference mode with three formats: Delta, Raw, and Normal
10.Fixed an issue where the Profile panel could not be zoomed
11.Added a close (×) button to the Profile panel
12.Added a Help button to assist users in quickly understanding available features
iPhone: Due to device size limitations, the new features are not supported at this time
2.1.2 Jan 9
For iPhone and iPad:
Added user-defined range selection for zooming
Improved axis display and coordinate interaction experience
Fixed some performance smoothness issues
1.4.0 Jan 9
For iPhone and iPad ：
Added a Reset button to restore the image display position
Added a warning dialog for invalid Clip Max values
1.3.0 Jan 8
For iPhone and iPad ：
1.Supports color (Turbo) display mode
2.Supports Clip Max (maximum value) selection for display
3.Supports showing/hiding functional orin panels
4.Fixed lag issues when collapsing panels**
1.2.0 Jan 8
In version 5.1.8, I finally had time to resolve issues related to the Dynamic Island.
1.Fixed an issue where Live Activity remained in the Ready state after all tabs were closed.
2.Fixed an issue where UUID-based file names could appear on the Dynamic Island / Lock Screen when using multiple tabs.
3.Fixed an issue where Matrix files could remain stuck in the Opening state on the Dynamic Island / Lock Screen.
4.Improved visual details on the second page of the iPhone onboarding screen.
more Version 5.1.8 3d ago
Data Not Collected The developer does not collect any data from this app.
