HebDate is a full Hebrew (Jewish) & Secular Calendar (Luach) for the Android.
* Full month views for Hebrew and Secular calendars. You can view any date since creation.
* View Day, Week, & Agenda.
* Full Android Scheduling Calendar. View and Edit Events.
* Chagim, Daf Yomi, and More.
* Zmanim for all locations.
* Widget that can be added to the home screen.
* Countdown timer for all Zmanim.
* Can be used as a (Hebrew) Date Picker by other applications (like "Tasks To Do")
* In-app subscription available for removal of banner ads.
* Setup recurring events on Hebrew dates, and it will sync with Google Calendar ( only).

There is also a Wear OS version of the app with basic features. It provides a complication that can be added to your watch face.