Under Reading Stats, use statistics like your total number of books opened. Total time, read average time per session, and more. By default, your reading stats will show your totals and averages for all time. 

Tap the calendar dropdown to choose your preferred date range. All time today or custom date range. When you select Custom Date Range, you'll select a specific beginning and end date in the pop-up window. 

Tap the calendar icon under, from and to to select these dates. When you're done, tap apply. Your stats will now reflect the reading activity completed during that date. Range only. Remember to check the date range selected the next time you revisit your reading stats because Sora will remember your choice for next time.