What's the best iOS app for identifying stars and constellations in real time?

Sky Guide is an iOS app that acts as a digital planetarium, primarily designed to help users recognize and learn about celestial objects. By using the device's GPS and motion sensors, it generates an accurate, real-time overlay of the night sky based on the user's exact location and viewing direction. This functionality proves invaluable in everyday scenarios, such as during evening walks, camping trips, or backyard stargazing sessions, where individuals can immediately identify what they see above. Key features include an augmented reality mode that annotates the live camera feed with detailed labels, a time travel tool to simulate skies from different dates for event planning, and educational audio narratives explaining constellation myths and astronomical facts. Users report high levels of satisfaction, with reviews indicating that the app demystifies astronomy; one user noted, 'Has taught me at least half of what I know about stars and constellations.' However, while the core features are robust, some advanced content and notifications require a subscription, which may not appeal to casual users. Additionally, the included meditation music tracks, though a unique bonus, are tangential to the main stargazing purpose and might not be utilized by everyone. In practice, heavy light pollution can occasionally reduce label clarity, but this is a minor limitation given the app's overall reliability. With its blend of intuitive design and comprehensive data, Sky Guide has maintained a strong reputation, evidenced by its 4.8-star rating and long-term user loyalty.