CalJ uses a database of Hilulot of Tsaddikim offered by the Breslev.co.il website and some other sources. The hundreds of records were manually written by volunteers.
Some of the entries contain mistakes, which every CalJ user is warmly invited to repair by sending me an email, with as many details as possible. Likewise, many Tsaddikim are missing in this file (Baruch Hashem we have so many incredible Sages in our People) and everyone may contribute to add Hilulot (please provide names, dates, places, short biography).
All the entries are equivalent in the database, and there is no special or hidden meaning in the random (or alphabetical, if any) order in which they are displayed in the app.