Moon Codex

Track moon phases, zodiac transits, and Void of Course periods with precision and style — plus a new Codex for learning. 200 years of astronomical data, entirely offline.

Starting something new? Wondering if today's the right day to sign that contract? Check tonight's moon before a big decision, or look up the exact phase on the day you were born. Moon Codex puts two centuries of precise lunar data on your device — phases, transits, and Void of Course periods, accurate to the minute. No internet, no accounts, no tracking.

PLAN AROUND THE LUNAR CYCLE Check tonight's phase and sign before making decisions. See exactly when the next transit or VOC period starts. Weekday labels and upcoming event lists make it easy to plan days ahead without flipping through calendars.

LOOK UP ANY DATE FROM 1900 TO 2100 Slide to any date across two centuries or step month by month. Tap the moon to snap back to today. Every sign change, phase shift, and VOC window is timed to the minute — useful for chart work, journaling, or just satisfying your curiosity about a specific date.

LEARN AT YOUR OWN PACE The built-in Codex covers moon phases, zodiac signs, planets, aspects, Void of Course, and practical timing — 40+ articles written plainly, without jargon walls. Tap any event in your timeline and jump straight to the article that explains it.

KEEP IT ON YOUR HOME SCREEN Three widget sizes plus a lock screen widget. Full iOS 26 tinting and translucent support. Glance at the current phase without opening the app.

NOTHING HIDDEN ± 1 minute accuracy from professional ephemeris-grade algorithms. No ads. No subscriptions. No analytics. Dark mode throughout. Runs on iPhone and iPad with full landscape support on both (also on Mac, built for iPad). Buy it once and it just works.