mHealth apps can be categorized into several groups including dedicated devices, fun apps, reference/education apps, location-based services, augmented reality, first aid, social networking, self-quantification, support, sales-driven, electronic health records, testing/substitution, miscellaneous, and add-on devices that combine with apps. Emerging technologies that could impact mHealth include paper phones, augmented reality glasses, and other innovations that may further integrate mobile apps and devices into healthcare.