Undersky
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Astrology that stays on your phone.

Your chart, computed with real astronomy. Your readings, tailored to you and written in your own language. Your birth details are never collected, and everything stays on your phone. No account, no tracking, no subscriptions.

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No sign-up No tracking No subscriptions Works offline
Tonight's sky showing the constellations Cancer and Leo with a total solar eclipse

Built for the people you love

Every relationship, its own lens

Partner, parent, child, sibling, friend, coworker. Undersky is the one astrology app where a parent and child chart never reads like a date, and readings about your kids stay developmental, always, enforced by the app itself.

Real astronomy underneath

Positions computed with precise astronomy and checked against independent sources. Eclipses, retrogrades, and returns come from the real sky, never guessed. The exact degrees are always there in Explore when you want them.

A sky that surprises you

Your daily and weekly readings know when an eclipse is coming, when a planet turns, and when your Saturn return begins, because the app computes the actual sky. Quiet days are honest too.

Your data is yours. Full stop.

Your birth details, your charts, and your readings stay on your phone, and we never collect them. The App Store privacy label reads "Data Not Collected," because there is nothing for us to collect. Astrology is personal, and we think an app should treat it that way by default rather than as a setting you go and find. That is how this one is built, from the very first screen. What any other app does with what it collects is on its own store listing, and worth reading.

Free every day. The rest, only if you want it.

Your horoscope is free, every day, forever. Your natal chart and its reading are free. A first look at your year is free. When you want more, it stays simple: relationship readings are a small one-time purchase that is yours to keep, and grows as your relationship does, however many times around the sun it lasts. Precise forecasts, timed to the minute, are there when you want them for planning. No subscriptions, no renewals, nothing to cancel.