Please always use only Apple's official VPP site for Volume Purchases (special discounts available for educational institutions):

AppConfig XMLs files (v3.5.18+)

• CALC Prime (v3.5.18) --> Designed for VPP
  
• CALC Smart (v3.5.18) --> OK for VPP, but better for individual purchases
  
• CALC Swift (v3.5.18) --> Not recommended for VPP, Subscription based

AppConfig XMLs files (prior to v3.5.18)

• CALC Prime (v3.5.6)
  
• CALC Smart (v3.5.6)
  
• CALC Swift (v3.5.6)

Manual MDM plist definitions

Actions: 

An NSString based key acting like an incremental "on switch" - one action will be executed per device / per increment (+1) starting with the integer value of 1.

• Reset all settings & customizations (@"resetAll")
  
• Erase history (@"eraseHistory")
  
• Restart tutorial (@"restartTutorial")
  
• Set Theme (@"setTheme")

Settings:

• Set Theme : enum {
                   ThemeLight = 0,
                   ThemeSilver = 1,
                   ThemeNight = 2,
                   ThemeYellow = 3,
                   ThemeSalmon = 4,
                   ThemeSky = 5,
                   ThemeCustom = 6
                   } (@"setThemeEnum");
• Disable Themes (@"disableThemes")
• Disable Converter (@"disableConverter")
  
• Disable Graphing (@"disableGraphing")
• Switch the default Division Symbol to "/" (@"switchDivisionButton") (added in v3.5.18)
  

Dictionary that is sent back to the MDM server as feedback (for info purposes) via @"com.apple.feedback.managed":

• static NSString * const kFeedbackResetAllCountKey = @"resetAllCount";
  
• static NSString * const kFeedbackEraseHistoryCountKey = @"eraseHistoryCount";
  
• static NSString * const kFeedbackRestartTutorialCountKey = @"restartTutorialCount";
  
• static NSString * const kFeedbackSetThemeCountKey = @"setThemeCount";