AstroFITS
Auto-Stretch and Transform
Free · Designed for iPad
A simple app to open FITS file in iOS quickly using GPU. It has an auto-stretch feature. And works on FITS file with RGB or gray color. It handles BITPIX of 8,16,32,-32 and -64. It is designed and tested for Seetar FITS file. It takes about 2 seconds to open and automatically stretch a 50mb FITS file. Sample links are provided below. Enjoy!
Use:
1. Download your FITS file to your phone File directory.
2. Tap Image icon on the first top left.
3. Select your FITS file.
4. It will auto stretch.
5. Adjust the image level.
6. Adjust the image curve.
7. Tap the second top icon to save image to Photo.
If you encounter an issue, please email to ustrainsit74@gmail.com with your FITS file as attachment.
Sample:
Below are some FITS files for download.
- https://drive.google.com/file/d/1Li8f1QH1u1R6U8RKZZ0kwW9LZ4cHCaXz/view?usp=share_link
- https://drive.google.com/file/d/1MVuW1oa7qAjbfdl_iGUI-q7knE2ij67v/view?usp=share_link
- https://drive.google.com/file/d/1TE70gdDK3XmLx9-iB43I-uh6INq8FCaO/view?usp=share_link
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- Fix a bug.
The developer, yong chong loh, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
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Information
- Provider
- yong chong loh
- Size
- 63.5 MB
- Category
- Photo & Video
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026