This is the Digital Split Leaf 1650 that presents tunes to aid in singing in addition to the text.
1. The Complete Text of the 1650 Scottish Metrical Psalter.
2. Split leaf view - couple any tune in the library with any psalm.
3. Play MIDI tunes to help learn them.
4. Get recommended tunes (growing as the tune database grows)
5. John Brown of Haddington's Notes. (Psalm 119 is incomplete at the moment). Available via a swipe from right to left over the psalm text.
6. Preface to the Psalter.
7. Full-text search of the psalter.
8. Search tunes.
9. Works on Android Phones and Tablets.