This is an application that iPad or iPhone becomes a sub-display to see the program code.
If you put a file in the folder of “The Code Viewer app” with the file app that comes standard with the device, it will be displayed in the selection screen, so when you select the target file, the code will be displayed in different colors.
(If you uninstall this application, the application folder will also disappear, so please put only the one you have backed up)
I'm an individual developer, so the color coding is not perfect, but I would like to slowly grow the application. If you have any insufficiencies, please let me know in the comments. I will fix where I can improve.