This article from the Nurse Journal website lists several apps that may be useful.
Free basic app converts medical language into everyday English. It is based on the award-winning Plain Language Medical Dictionary widget designed by Taubman Health Sciences Library, University of Michigan.
Epocrates offers a medical reference app.
The link below offers a sample of NLM mobile applications and web sites optimized for mobile devices.
You can explore iTunes and Google Play for additional applications created by NLM.
NCSBN Medication Flash Cards