This free astronomy app helps deep-sky observers track celestial objects. It shows what's visible in your sky tonight, sorted by urgency, and allows you to plan future observing sessions and log your observations. It features a dark theme and red night mode for preserving night vision.
1.1.0
August 21, 2026
New in this update: - Add observing sites by search, map tap, pasted Google Maps link, or coordinates - Bug fixes and UX polish
MoreHi Laura, We are glad that you are enjoying the app. Thanks for your review. Clear skies! 🌌
MessierMate is a free astronomy app designed for deep-sky observers. It helps you identify and track the 110 Messier objects, plan your observing sessions, and log your observations with detailed notes and photos.
Yes, MessierMate is completely free to use. The app explicitly states 'No ads. No in-app purchases. Ever.' and is available at no cost.
No, MessierMate is ad-free. The app's description clearly states that there are no advertisements included.
Yes, MessierMate works completely offline. Sky calculations and all core features are available without an internet connection, making it ideal for remote observing locations.
MessierMate is supported on iPhone, iPad, and iPod devices. It is designed to function across Apple's mobile ecosystem.
The latest version of MessierMate is 1.1.0, which was last updated on August 21, 2026. This indicates a recent update, suggesting ongoing development and support.
MessierMate has an age rating of 4+. This means it is considered suitable for children aged 4 and older, with no mature content.
MessierMate provides a monthly planning calendar that shows moon phase, dusk time, and the number of visible objects. It also offers a timeline view for when each object rises, peaks, and sets, and can automatically detect Messier Marathon nights.
