I would suggest in the page index, a counter with so many pages readed in the day (or after reseting the counter with pressing enter for 3 seconds). It is like this mod:
https://www.mobileread.com/forums/showthread.php?t=36166
I have been using it for a year before install prs+ and it is one of the most useful mod I have seen, even it calculates who much time do you need to finish the current book, based in your pages per minute index....
thanks