Collaborator works with Time Keeper, a paid Android Market application. It allows you to send time card data to anyone using your GMail account. It also allows you to do what no few Android users can: Send ANY kind of E-Mail attachment using that same account. Time Keeper is required for this application to function.This product is licensed under the terms at http://timekeeper4android.wordpress.com/2013/01/17/time-keeper-and-time-keeper-light-eula/