Kimá Jewish Lunar-Solar Clock

Kimá, the Jewish clock, on your phone, your tablet and your Wear OS watch.

The Torah's hours don't last sixty minutes. They are shaot zmaniyot: twelve by day and twelve by night, stretching in summer and shrinking in winter, because they follow the sun that rises and sets where you are. Kimá computes them for the real sky above your location, not for an average schedule.

THE LIVING CLOCK
The dial divides your day into twelve daytime hours and your night into twelve more, anchored to sunrise and sunset in your own place. The celestial hand marks where the sun is — or the moon, once the sun has set — and the ring shows the hour running now, with its Hebrew letter.

THE CLOSE OF THE DAY
Between sunset and the stars coming out, the sky of the clock passes through its in-between color and three stars light up, one at a time. When the third one finishes lighting, the Jewish day has ended and the next one begins. This is the moment that decides when Shabbat comes in, when a fast ends, when the Hebrew date changes.

THE FOUR INSTRUMENTS
• The sundial: the shadow of the gnomon across the proportional hours, like the dials that measured time in Jerusalem.
• The water clocks: the alabaster clepsydra of Karnak — the oldest one that survives — and the dripping clepsydra, with living water and a drop falling in real time.
• The stone of the Tanakh: the verses that tie each threshold of the day to its source, from Bereshit to the Prophets.
• The moon of the Hebrew month, in its true phase, over the surface photographed by NASA.

UNDER THE SAME SKY
Behind the clock is the sky that is really above you: 9,096 stars from the Bright Star catalog, projected onto your horizon, with their real brightness and color. The same ones Avraham looked at when he was asked to count them.

ON YOUR WRIST
The Wear OS version brings the clock to your wrist: the proportional hours, the zmanim of your place, the phase of the moon, the direction of the Kotel and the tefillah that belongs to this moment of the day.

FOR THE HOUSE AND FOR THE NIGHT
Home screen widgets, in several sizes, with the living hour always in view. And a bedside mode that turns the phone into a table clock: a calm screen, large type and the sky behind it, to look at when you wake in the night.

IN ENGLISH AND IN SPANISH
The whole app, including the sources and the Hebrew dates, in both languages.

MADE FOR EVERYONE
You don't need to know Hebrew, or to have grown up with any of this. Kimá explains what it shows: what a proportional hour is, why the day begins at sunset, what is remembered on this date. It serves the person who prays three times a day just as much as the person who only wants to know when Shabbat comes in.

NO ACCOUNT AND NO ADS
We don't ask you to register. There are no ads. Your location is used only to compute your zmanim on your own device, and it is never shared with anyone.

Kimá is part of the My Jewish Day family.