Seal of Solomon: Goetia

Before clocks were mechanical, the hour was a division of daylight. The time between sunrise and sunset was split into twelve, the night into twelve more, and each of those unequal hours was given to one of the seven classical planets in the Chaldean order. Solomon computes that for wherever you are, right now.

PLANETARY HOURS, CALCULATED NOT GUESSED
Sunrise and sunset for your place and date, the twelve day hours and twelve night hours that follow from them, and the planet ruling each. The current hour is shown first: which planet, how far into it you are, and when it ends. The ruler of the day is there too — the planet of the first hour after sunrise, which is where the names of the weekdays come from.

Hours are unequal by design. A summer day hour runs long and its night hours run short, exactly as the tradition intends, because the calculation follows the Sun rather than the clock.

WHEREVER YOU ARE
Pick your place by searching a built-in list of roughly 730 cities, by typing coordinates, or from your device's approximate location. Save several places and switch between them. The astronomy runs on the device — no lookup, no server.

HOME-SCREEN WIDGET
The planet ruling the hour, right now, updated as each hour turns rather than on a fixed clock schedule.

THE SEVEN PLANETS
Saturn to the Moon, each with its day, metal, colour, incense, keywords, and what its hours have traditionally been held to favour. The correspondence tables of ceremonial practice, in one place, written plainly.

THE 72 SPIRITS OF THE ARS GOETIA
The full catalogue from the Lesser Key of Solomon: number, rank, legions, and office, in original concise summaries rather than a reprinted translation. Each spirit is placed on the zodiac — its decan and its five-degree quinary — following the nineteenth-century Golden Dawn arrangement, which the app names as such, since the Lesser Key itself assigns no planetary rulers.

That placement connects the two halves of the app. Open a spirit and you see the next hour of its ruling planet at your location. Open the current hour and you see which of the seventy-two fall under it, one tap from the filtered catalogue.

HISTORICAL, NOT SENSATIONAL
This is a reference and a calculator: source material presented as what it is, with later additions marked as later additions. No theatrics, and no claims about what any of it does.

WORKS OFFLINE
Sunrise, sunset, hours and rulers are all computed on the device. No account, no sign-in, nothing uploaded. The location permission is optional — it reads a last known fix once, only when you tap for it, and never tracks you.

Free, supported by ads. A single one-time purchase removes every ad permanently, on any device signed in with the same Google account.