Super useful app!
This app allows you to view ICC profiles in 3D. You can compare any profiles/color spaces to visualize the gamut of each and understand your color capabilities. The app comes with a few popular CMYK standard profiles but you can add your own, you just need to gather them from your computer and upload them to Apple iCloud, Dropbox, or Google Drive and you can access them thru the app from there. You can also add your own CxF files. These are spot color measurements. The app will plot the colors from the CxF file in 3D and allow you to visualize if the color is in or out of gamut for any ICC profile (camera, monitor, printer). Very helpful and a steal for the price.