Hesperian's Safe Pregnancy and Birth app is designed for, and has been tested with, people in developing countries. It is available for free download for both Apple and Android devices and there are links to all the downloads at http://hesperian.org/books-and-resources/safe-pregnancy-and-birth-mobile-app/
'Available in English and Spanish, Hesperian’s comprehensive app on pregnancy and birth contains a wealth of information on: •how to stay healthy during pregnancy •how to recognize danger signs during pregnancy, birth, and after birth •what to do when a danger sign arises •when to refer a woman to emergency care •instructions for community health workers with step-by-step explanations such as “How to take blood pressure,” “How to treat someone in shock,” “How to stop bleeding.”'
Hesperian also produce a range of health-related books, all designed for people in developing countries, which can be purchased and/or downloaded from their website.
Their Gratis Book Programme sends free copies to organisations in developing countries - http://hesperian.org/books-and-resources/gratis-book-program/has information on how to apply
Note: I originally posted this in reply to another post, but thought I would share here too so more people would see it.