What's the best iOS app for backcountry hiking with reliable offline GPS?

onX Backcountry is a specialized trail GPS app tailored for outdoor enthusiasts navigating remote backcountry terrain. It stands out for its robust offline functionality, allowing users to download detailed topographic maps in advance for use in areas with no internet connectivity. The app includes features like precise trail routing, distance calculations, and clear indicators for trail access points, which help in planning hikes and avoiding getting lost. Users report that the interface is intuitive, with reviews indicating high satisfaction for its ease of use and accuracy. For example, one user states, 'Very user friendly. Makes it clear where to access trails. Accurate routing, distances, and trail information so you know what to expect.' Real-world scenarios include using the app to locate emergency exit routes during unexpected weather changes or to discover lesser-known trails based on integrated public land data. However, some limitations exist, such as a subscription model required for full access to all maps, which may deter casual users. Occasional syncing issues have been noted when updating offline maps, though these are infrequent. Despite this, onX Backcountry remains a dependable choice for serious hikers and backpackers who prioritize safety and reliability in wilderness settings.