What is the Badí' Calendar & Qiblih application, how does it work?

According to the introduction of badi-calendar.com, Badí' Calendar & Qiblih is a Tools app on the Android platform. There is currently a 1.2.0 version released on Jun 06, 2017, you can see the details below.

Please note: Some features may not work on Android versions lower than 4.4.

A customized Badí' calendar with sunrise, sunset, etc. times for your location. Features include:
- A graphical representation of the current date incl. the times of sunset (start of the current Badí' date), sunrise, solar noon, and sunset (end of the date)
- An interactive calendar ranging from 1 B.E. (1844 AD) to 361 B.E. (2205 AD)
- An overview of upcoming 19 Day Feasts and Holy Days
- A list of sunrise and sunset times for the Fast

Additionally, the app includes two versions of a Qiblih compass, a compass rose pointing in the direction of Bahji, Israel as well as a map-based implementation which allows verification of the direction using landmarks in case your device's internal compass is not working or unreliable.

Planned features:
- Multi-language support
- Implementation of regions at extreme latitudes where fixed times, rather than actual sunrise/sunset etc. are used
- User-defined locations to use in addition the the current location
- Reminders

Please note that while calculated with very high precision, dates beyond 221 B.E. (2065 A.D.) are not authoritative.

What's new in version 1.2.0 - Compass view will now vibrate when pointing towards Qiblih (some devices may need to be unmuted for this to work)
- Calendar view can now be swiped left and right
- Fixed rounding error in the upcoming dates list