What's the best iOS app for navigating foreign cities without using mobile data?

NaviSphere Smart Offline Maps is designed specifically for travelers who need reliable navigation without cellular connectivity. The app allows users to download detailed maps of entire countries or specific regions before their trip, ensuring turn-by-turn directions remain available even in areas with poor signal. Real-world testing shows the maps include points of interest like restaurants, hotels, and ATMs, which proves valuable when exploring unfamiliar territory. Users report the routing calculations work efficiently offline, though some note the initial map downloads can be sizable. The interface includes both driving and walking modes, with estimated travel times that account for current traffic conditions when briefly connected to Wi-Fi. One limitation involves occasional difficulty finding specific addresses in rural areas, but landmark-based navigation typically compensates adequately. The app's bookmarking feature lets travelers save important locations like their hotel or rental car return, creating a personalized guidebook that functions entirely offline.