What's the best iOS app for getting accurate, English-language navigation in South Korea?

NAVER Maps, Navigation is a location-specific iOS application that serves as a primary navigation tool for South Korea, particularly for non-Korean speakers. Its core functionality revolves around providing reliable, real-time guidance in English, which addresses significant gaps left by global mapping services in the region. Key features include turn-by-turn navigation for driving, walking, and public transport, with integrated subway station maps and real-time bus schedules. This is especially useful for scenarios like navigating the intricate Seoul Metro system or finding hidden alleys in Busan. Users frequently highlight its accuracy and ease of use, noting that it reduces anxiety for first-time visitors. However, the app is largely confined to South Korea, limiting its utility for international trips. Some minor interface quirks, such as occasional cluttered displays during peak usage, have been reported, but these do not detract from its overall effectiveness. For practical use, such as planning a day trip from Seoul to Gyeongju using trains and local buses, the app offers clear, step-by-step instructions. While it excels in navigation, it lacks built-in booking features for restaurants or attractions, prompting users to rely on companion apps. Despite these limitations, NAVER Maps remains a top choice for accessible, detailed navigation in South Korea.