The document introduces WhirlyGlobe-Maply, an open source geospatial display component for mobile apps. It discusses developing native mobile apps versus web apps, and provides tutorials and examples for iOS development tools and apps created with WhirlyGlobe-Maply. Several app examples are broken down, including Tremor Tracker, Marine Traffic, and a NASA data browser app. Links are provided to contact the author and for more information on WhirlyGlobe-Maply.