This APP includes San Francisco offline map, high-quality subway map and useful information for traveling in San Francisco. GPS locates your current position in real time, guaranteeing you will not lose in San Francisco.
The most important feature is: NO Wifi, NO 3G and NO Data Roaming needed. 100% Offline. Save you expensive roaming service fee when you travel internationally. With this app, you can easily travel in San Francisco without any guide.