This is a great, easy to use, easy to update IPhone App for both Catholic Tourists and locals who want to attend the Eucharistic celebration here in Singapore.
It has a list of all the churches here and maps which can be launched manually or by location service. It also not only provides timings for mass but devotions as well.
Now if only their next update will include how to get there i.e. Bus nos nearest MRT stations. Hmmmm