Key features: 1. Offline maps from official sources. 2. Usable even no internet connection and Wi-Fi lost. 3. Can zoom in, zoom out and scroll vertical and horizontal. 4. Easy to use. Quick to find your place. 5. Without charge. 6. Bookmark and customize maps and web pages by yourself. 7. Local guide and local foods guide. This app includes: 1. DOWNTOWN CHICAGO 2. CHICAGO CTA SYSTEM MAP 3. L RAIL SYSTEM MAP 4. NIGHT OWL MAP 5. CHICAGO TRAVEL GUIDE BOOK 6. CHICAGO ATTRACTION MAP 7. FIRST BUS/LAST BUS TIMES 8. SHORE LINE MAP