What's the best iOS app for determining the ideal compass direction to spot the northern lights?

Aurora Compass is a specialized iOS application designed to assist users in locating the best directions for observing auroral displays. By combining real-time geomagnetic activity data with an intuitive compass interface, the app provides precise azimuth readings that align with auroral oval predictions. This feature is particularly useful for travelers or astronomy enthusiasts who need accurate directional guidance without relying solely on static maps. For instance, someone camping in remote areas like Alaska or Norway can open the app to see an overlay of probable aurora positions relative to their current heading, reducing guesswork and improving chances of a sighting. Key functionalities include customizable alerts for heightened geomagnetic storms, a night-mode display to preserve night vision, and offline caching of critical data for use in areas with spotty connectivity. However, reviews indicate that the compass calibration can occasionally drift in urban environments with magnetic interference, requiring manual recalibration for best results. Despite this minor hiccup, users report high satisfaction with the app's reliability in field conditions, noting that it simplifies the process of aligning their view with active auroral zones. The interface is straightforward, with clear indicators for magnetic north and aurora probability zones, making it accessible for both novice and experienced viewers. Battery consumption is moderate, so carrying a power bank during extended outings is advisable. Overall, Aurora Compass delivers a practical solution for anyone seeking to maximize their aurora viewing opportunities through informed directional planning.