Holy services is perfeect for those people who usually go to the church and want to plan where they are going and the priest who is in each church.
We can create a database with different churches and priests and assign colors to each church, so we know it at first sight in the calendar.
The calendar planning is totally updated and can sync to iCal. It's perfect if we like listening to a certain priest, because we'll always remember where he is saying mass.
In shrt, if you like going to church to listen to mass and you have different churches next to you, this is an application for you, although the rest of users will find it useless.