I am not a singer, but I do like the idea of having a small hymnal at my whim. Plus, this gives me hope of including denominational hymnals one day. Anyway, it plays MIDI files, includes images of the hymns (words and music) as well as printed words. You can find it here.

Here is a screenshot:

The MIDI’s are not available on iOS, however, but honestly… MIDI’s should be used for 2 things: Geocities and hearing the tune.