What's the best iOS app for finding dark sky locations and predicting optimal stargazing conditions?

Stargazing Hub is a highly-rated tool specifically designed for astronomy enthusiasts who need to plan their observing sessions. The app stands out for its detailed, up-to-date light pollution mapping, which is crucial for identifying truly dark sky sites away from urban glow. A key feature is its ability to predict optimal viewing times by integrating data on moon phases, weather transparency, and atmospheric seeing for a user's specific location or a chosen destination. For a real-world scenario, a user planning a weekend camping trip could use the app to scout several potential campsites, compare their current light pollution levels, and see an hourly forecast for when the sky will be darkest and clearest. Reviews indicate users are consistently impressed by the depth of features available in the free version, which includes notifications for astronomical events. A minor limitation is that the most granular weather data for very localized conditions, like sudden fog, still requires consulting a dedicated weather service. Overall, it provides a comprehensive planning suite that addresses the major variables for successful stargazing.