Three different formats for the hymnal have been provided here.
The 2 downloadable PDFs are compatible with most computers, tablets, and smartphones including the Apple brand. The International edition contains cross-references to hymns in the German, Dutch and French hymnals.
The 3 downloadable iBooks (the ePUB icons) — the song leader edition, the international edition and accompaniment version — are compatible with Apple devices. All have a music playback button but the accompaniment version has a very large playback button in the middle of the screen so that it is usable on smaller screens.
The mp3 player format (audio icon) is for people who just want to listen to the hymns.
Hover over the title below the icon if you want to see which version you would be downloading.