Jewish Calendar is a comprehensive app that provides users with the ability to convert dates between the Jewish and secular calendars. Developed by Plenitech, this free app is available for iPhone users.

The app offers a range of features, including the dates of Jewish holidays and events for any given year. Users can also access information about the Parasha of the week, Rosh Chodesh, and Shabbat times. Additionally, the app provides everyday zmanim, such as Birkat haMazon, Kaddish, Hashkabot, Tehilim, Mincha, Arvit, Tefilat haDerech, and Borei Nefashot.

Jewish Calendar also includes features for birthdays and Azcarot/Yahrzeits, as well as zmanim reminders and Sefirat ha'Omer. The app even offers a Jerusalem Compass for users to determine the direction of prayer.

With its wide range of features, Jewish Calendar - CalJ is a valuable resource for those looking to stay connected to Jewish traditions and observances.