- Contacts (to keep information on fellow missionaries, local Church leaders, investigators as well as your friends and family at home)
- Calendar (to keep track of appointments, meetings, events, birthdays, and holidays)
- Mail (to receive and send email)
- Music (to listen to music as well as to hear the missionary tasks in Spanish)
- Safari (to access the world-wide web)
Navigation (to jump from one scripture to another) is much better than in the LDS Gospel Library, which makes it ideal for finding references fast during Church meetings.
This app also allows you to see the words and sheet music to hymns, to play built-in recordings of the hymns (with or without the words in English only, so it doesn't replace the LDS Music app, described below). The disadvantage of LDS Scriptures Library is that it doesn't contain the manuals in Spanish. That's why I use both of these apps.
Important Note: Whichever app you use, you should learn how to use "tabs" to be able to keep more than one book open at the same time (and even more than one place within the same book). For example, during Sunday School class, I keep open a tab with the instructor's manual, a tab for the main book and chapter of scriptures upon which the current lesson is based, and tabs for additional scriptures and references. I just touch a tab to jump back and forth among these references.
There are other LDS hymn apps but I think this one is the best.
You can use the app completely off line, but if you are online, it will automatically update the exchange rate of the currencies. Because the relative value of the euro and dollar change regularly, this is a nice feature.
That's my list of invaluable apps that will help you get the most from your iDevice while you are on your mission. If you have questions or comments about these apps, don't hesitate to send me an email (at firstname.lastname@example.org).