BookTrove

BookTrove tracks used and new book prices for the books on your reading list, and alerts you when one drops below a price you set. Connect a want-to-read list from Goodreads, Hardcover, or LibraryThing, or add books by hand. BookTrove checks prices for each one, keeps a history so you can spot a genuine deal, and notifies you when something falls under your threshold. Signed copies and first editions are flagged in the list. It's handy for series readers and for parents - set a low threshold and pick up used copies cheaply as they come up! Your list and price history stay on your device. Price checks go directly to the booksellers you choose.