I have developed a critical appraisal app for Android called EBM Rater. It covers all the major study designs including noninferiority studies. I also included the criteria to evaluate subgroup analyses, composite endpoints, and surrogate endpoints. It includes standard EBM calculators also. Its in the Google playstore and on amazon <http://www.amazon.com/EBM-Rater-Team/dp/B00KLLBHWS/ref=sr_1_1?s=mobile- apps&ie=UTF8&qid=1401464533&sr=1-1&keywords=ebm+rater> . I have always suspected many docs don't critically appraise what they read because the criteria were unknown to them and not located in a convenient to use package. I hope some of you will give this a try and send me some feedback either thru this listserv or at [log in to unmask] It does cost $0.99. I don't get any of the money. It goes to the students who helped code it to maintain it and update it in the future. I hope to develop an iOS version in the future. Thanks for giving it a try Terry Shaneyfelt, MD, MPH UAB School of Medicine Ebmteacher.com @EBMTeacher