Hesperian Health Guides currently has one free app, available in Spanish and English, that provides free maternal health information. It is called the “Safe Pregnancy and Birth” app, and is available for Apple and android devices (http://hesperian.org/books-and-resources/safe-pregnancy-and-birth-mobile-app/ ).
We haven’t conducted very much quantitative research on the impact of this app, but if you would like for me to share any of our statistics on its use, please let me know. It has also been used in several trainings, such as a midwife training in Oaxaca, conducted by the Oaxacan Ministry of Health (http://hesperian.org/2015/08/19/bridging-the-healthcare-divide-6th-annual-midwife-training-2/).