The Gene Tutor app, designed as a study aid for a genetics course at Barnard College, is a great reference app for any student of molecular genetics. The app covers a number of topics such as Mendelian genetics (including subtopics such as probability theory, pedigree analysis, and chromosomes and linkage), DNA structure and replication, gene regulation, and DNA repair/recombination. A set of study questions accompanies each topic, with each question marked as being easy, intermediate, or hard. App users can flag specific questions, and they can track their progress through the “statistics” tab. Navigation through the app is cumbersome and not very intuitive—for instance, the only way to exit a study question session (without going through all of the questions) is to rotate the iPad into landscape orientation to display the menu. (One cannot access the menu sidebar in portrait orientation.) Navigational issues aside, the app contains a lot of useful information.