madReader has 6 status states: Read, Want, Pre-Ordered, Reading, TBR (to-be-read), Interested and DNF (did-not-finish). You can sort in grid or list mode and visually see what status the book is by various icons. The only one which doesn’t have an icon is “Interested” which is also the default state when you add a book.
Here is a vid showing how to use the madReader app to find the next book you want to read. Or basically how to sort through your TBR’s (to-be-reads).