Application allows tracking of locations, creating new landmarks, calendar events, money transactions for Contacts, supporting Todo list.
An action item can include several simple events. E.g. Calendar, Contact, Todo means that when Contact calls you the app notifies about the moment of time, Contact and Todo during ringing.
Money balance could be calculated with any Contact based on Opening Balance and List of transactions. Debit field means that a Contact gives money to you and Credit vice versa, that you give your money to the Contact. When a Contact calls you the application shows ending balance with this person before you pick phone up.