Write an Android application (ionic framework) 2 apps

Hello there we have two EXISTING APP's that need calDAV and calDEV support added to them and some minor updates DONOT APPLY FOR THIS PROJECT IF YOU DONOT KNOW IONIC FRAMEWORK ZIP RECEIPT [login to view URL] this app sends invoices from mobile devices to clients and customers in the format of a PDF file. a copy of this invoice is also sent to the user of the app for historical storage via email THE UPDATE we need to use calDEV for google & calDAV iCLOUD to store this information in the users calendar and google drive or icloud storage plus the fixes in the large list (as pictured) ====================================================== DONDI [login to view URL] this app is a timesheet system for employees to log their hours to the payroll the office. the app sends a PDF generated file to the selected email address and sends a copy to the users email address for historical storage as well as generates a full monthly report every 28 days THE UPDATE we need to have calDAV+calDEV support added so that the daily hours of each day are logged in the users calander and the files can also be stored into the cloud drive accounts. plus the items on the small list (as pictured)