Android App: Reference of medical emergencies

I am a student at Uni Bonn School of dental medicine - Germany. I am helping one of my professors in his trauma research. The app will be used as a simple reference of medical emergencies for the public. It will contain text and photos for offline viewing. The interface should be fairly simple, such as few buttons (forward and backward). The app should be based on a specific diagram. I was hoping for developing the app for Android, but if it is possible to create it in HTML5, I guess it would be easy to port to other operating systems later, such as iOS or Blackberry, or even as a Webapp. I can help with the graphic part of the app. I can design the the icon and splash screen etc... However, I need someone who can write the App. I would try to learn how to develop Apps myself, but I unfortunately do not have the time. I hope I can spread the great information my professor had writing over the years, because it could save someone tooth. I hope you can offer an affordable solution for a student like me. Thanks.