Halachic Applications
Shemesh – Zmanim Alarm Clock
Beta · version 1.3.0 Android 5.0 and up English · עברית

Your phone, set to zmanim.

Set an alarm for “15 minutes before candle lighting” or “at sunrise” once, and it rings at the right time every day, wherever you are. It stays quiet on Shabbos and Yom Tov unless you tell it otherwise.

Download the beta See what it does
Sunday, October 11, 2026 · New York ל׳ תשרי תשפ״ז · 30 Tishrei 5787 · Rosh Chodesh Cheshvan
    Today’s zmanim for New York, worked out the way the app does. An alarm set to “18 min before sunset” rings at 6:03 today and moves a little every day as sunset does.
    Screens

    Looks the way you like

    The app follows your phone’s light or dark setting, or you can choose Light or Dark in Settings. On Android 12 and newer it also takes its colors from your wallpaper. Turn that off to keep the app’s own navy and gold. Use it in English or Hebrew.

    Today screen in light mode: Friday's date and Hebrew date, the next alarm for candle lighting at 5:55 PM, and the zmanim coming up
    Today at a glance
    Zmanim screen in dark mode listing dawn, sunrise, Shema (MGA and GRA), Tefila, midday and Mincha times
    The day’s zmanim, in dark mode
    Alarms screen in blue wallpaper colors: Shacharis, Wake up, Mincha and Candle lighting alarms, each tied to a zman
    Alarms tied to zmanim
    Alarm editor in dark green: 18 minutes before sunset, every Friday, with switches for Shabbos and erev Yom Tov
    Set it once
    Dates screen in purple: two yahrzeits and a Hebrew birthday, with the civil date each falls on this year
    Yahrzeits and Hebrew birthdays
    Today screen in Hebrew, dark teal: the next alarm and the zmanim coming up
    Fully in Hebrew
    Features

    Everything the day needs

    Alarms by zman

    Pick any zman, then minutes or hours before or after it. Repeat on chosen days, add a label, choose the sound. The alarm recalculates every day.

    Quiet on Shabbos and Yom Tov

    Alarms skip Shabbos and Yom Tov automatically, with one day in Israel and two outside. Turn ringing back on for any single alarm, or add erev Yom Tov to a Friday alarm.

    Your shitos, your minhag

    Choose the opinions you follow (MGA or GRA, dawn and nightfall, candle lighting minutes, when Shabbos ends). Tap any zman to see how it is calculated. Compare with my luach finds which opinion your printed calendar uses.

    Hebrew calendar

    • Hebrew date, parsha, holidays, fasts and Rosh Chodesh
    • Erev Pesach chametz times
    • Daf Yomi and other daily learning
    • Yahrzeits and Hebrew birthdays, each year on the right date

    Reminders

    • Sefiras HaOmer, in Hebrew and English
    • Chanukah candles, Kiddush Levana, Eruv Tavshilin
    • Tal U’matar and Birkas Ha’ilanos
    • Optional Do Not Disturb for Shabbos

    Built to ring

    Alarms use Android’s exact alarm clock, so they ring even when the app is closed. An Alarm check finds settings that could stop an alarm and fixes them. When you travel, times follow your location. No account, no ads, and your data stays on your phone.

    Help

    If something goes wrong

    An alarm didn’t ring

    Run Settings › Alarm check first. Then open Settings › Alarm history and tap Send report, so we can see what happened.

    A time doesn’t match my luach

    Open the zman and tap Compare with my luach to find which opinion your calendar uses. Still off? Email us the date, place and time you expected.

    Updating to a new version

    Download the new APK from the download page and install it the same way. Your alarms and settings are kept.

    Try the beta

    Not on the Play Store yet. Installing straight from our site takes about two minutes.

    Download and install
    Contact

    Questions, feedback or a wrong time?

    Email us any time. If a zman doesn’t match your luach, include the date, place and time you expected.