Name a book, such as Romans, and a number of weeks. The chapters are split into contiguous readings, and each week keeps the weekday of the date you choose. If the book has fewer chapters than weeks, the planner stops and says so. A one-chapter letter is not stretched into a month.
A theme, such as a quiet life, does not pretend to be a book. You get dated weeks and no invented passage ranges. Titles are suggested after the calendar exists. You can change every one of them.
The series study is part of lifetime ($49). A single pack does not include it. The preaching calendar, where you set Sunday or Saturday and track prep, is part of lifetime too.