The hours of your day
Every planetary hour and its ruling planet, for any city.
iPhone · iPad · Apple Watch
Know the hour,
rule the day
Every hour of the day is ruled by a planet — an ancient system for timing what you do. Planetary Hours shows you the planetary hour you're in right now, tuned to your exact location, and plans the rest of your day around it.
Free to start · No account needed · 30 languages
Scan to install
on your iPhone or iPad
What are planetary hours?
Planetary hours are an ancient way of dividing the day. Daylight — from sunrise to sunset — is split into twelve equal parts, and the night into twelve more. Because day and night lengths change with the seasons, these “hours” are rarely sixty minutes long.
Each hour is ruled by one of the seven classical planets, cycling through the Chaldean order — Saturn, Jupiter, Mars, Sun, Venus, Mercury, Moon. The first hour after sunrise is ruled by the planet that names the day: the Sun on Sunday, the Moon on Monday, Mars on Tuesday, and so on.
Practitioners pick the hour that matches their intention — a Venus hour for love or money, a Mars hour for courage and action, a Mercury hour for messages and deals. Planetary Hours does the maths for your exact spot, so you always know which planet rules the moment.
Everything the sky is doing — in one place
The website gives you the live hour. The app gives you the whole sky, every day.
Follow the Moon's rhythm
Phase, sign, illumination, and void-of-course at a glance.
A complete lunar almanac
Rise, transit & set, live position, and the year's eclipses.
Where the planets are now
Live zodiac positions for the Sun, Moon, planets, and Chiron.
Plan ahead, look back
Pick a date and see its planetary rulers and hours. App only
Tuned to your sky
Sunrise-exact hours for your spot — or any city on Earth.
Never miss your hour
A gentle alert the moment your chosen planet's hour begins. App only
What each hour is for
Best-for and what-to-avoid guidance for each planetary hour. App only
Eclipses, decoded
Magnitude, timing, visibility, and meaning for each eclipse. App only
The web shows you now. The app shows you everything.
- Notifications when your planet's hour begins
- Best-for / avoid guidance for all seven planets
- Moon almanac, live planet positions and eclipses
- Any past or future date, multiple saved locations
- Home-screen widgets and Apple Watch complications
- Second-level precision and 30 languages
Frequently asked questions
What is Planetary Hours?
Planetary Hours is an iOS app that shows you the current planetary hour and its ruling planet, tuned to your exact location. It also tracks Moon phases, void-of-course, live planet positions and eclipses — on iPhone, iPad and Apple Watch.
What is the best planetary hours app?
A good planetary hours app should be accurate to your exact location, cover all seven classical planets across both day and night, and alert you when each hour begins. Planetary Hours does all of this — free, in 30 languages, with sunrise-exact astronomy — and adds Moon phases, live planet positions and eclipses.
How accurate is Planetary Hours?
It calculates every planetary hour from the real sunrise and sunset at your precise coordinates, using authority-grade astronomy validated against professional ephemerides. Hour boundaries are accurate to the second and update live.
Is Planetary Hours free?
Yes — Planetary Hours is free to download and use, with an optional premium upgrade that unlocks extra features. No account is required.
Does it work for my city, and offline?
Yes. It works for any location on Earth — your current spot or any city you choose — and calculates everything on your device, so it keeps working without a connection.
Which devices and languages does it support?
Planetary Hours runs on iPhone and iPad, with an Apple Watch app, home-screen widgets and an App Clip. It is fully localized in 30 languages.
What else does Planetary Hours do besides planetary hours?
Beyond planetary hours and their ruling planets, it includes a Moon almanac (phase, sign, illumination, void-of-course, rise and set), live zodiac positions for the Sun, Moon, planets and Chiron, the year's eclipses, and notifications when your chosen planet's hour begins.