Koreader's footer/mini progress bar can be set to display the pages to the next chapter, and the x of y for the book, and battery%, and current time, and progress percentage. It can be set to "show all at once" or you can toggle thru the ones you selected, by poking where they are displayed.
It allows you to deal with .css in a number of ways, defaulting to that in the .epub. You can add your own to the list that you can add to the cascade.
Luck;
Ken
It's been a while since I have used the Android version, it may be slightly different , in some regards. It works the way I described on my Kobo Aura HD.
This post might be of interest.