Write a Software able to convert a backup file from an app to another backup file for another app -- 2

Write a little software with minimal interface (just a pickup and a convert button) which is able to convert a backup file from an Android app (Timesheet) to a backup file for an iPhone app (TimeTrack). Both are apps used to track work time. We need to convert all our data from Timesheet to TimeTrack. In attached file you will find a sample backup file from Timesheet ([login to view URL]) and a backup file for TimeTrack ([login to view URL]) Then the software must convert the xml file to sqlite so we can import all the data from old app. Of course the file that will be converted with the software will be perfectly compatible with TimeTrack. All information must be conserved (Projects, Categories, Price per Hour, Clients, etc..)