After exploring the body and the heart, developer eMedia has released a Pocket Brain app for iOS devices that provides a detailed look at eight layers of the brain, including cross sections, nerve pathways, and a load of supplementary learning material. eMedia calls the app a "fully searchable interactive 3D atlas" with structures that are pinned with identifications and additional clinical and anatomical information, and users are able to add their own notes on the brain within the app. Pocket Brain also includes quizzes and interactive clinical cases that may appeal to medical students and other professionals. But regardless of your medical ambitions, the app may appeal to anyone who wants to peek inside their own pate — and you can grab it in the App Store right now for $19.99.