This service is a simple way to evaluate a niche for your Kindle book.
Just paste prices and BSR of the competing books into the cells and you’ll see the estimated income you can get if you publish a better book in this niche.
As a basis, I used the table by James J Jones that breaks down the approximate monthly Kindle e-book sales based on the Best Seller Rank.
Have a nice day.
Sincerely, Alexander S. Krylov.