AstroFITS

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 [email protected] 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

Privacy policy and term of use (EULA) is at https://deepskycolor.blogspot.com/2018/12/privacy-policy-for-deep-sky-color-app.html