I was using iGO offline maps for navigation on Windows Mobile where one could search for addresses and also POIs. Sygic was a similar app later available on the

I was using iGO offline maps for navigation on Windows Mobile where one could search for addresses and also POIs. Sygic was a similar app later available on the Sony P1i. Both of these were offline apps using maps from multiple sources, at a time when Google were still gathering data and mobile online access was expensive and inconvenient. At least when using iGO the iPhone and Android didn't exist yet.