Latest, 19 Oct 2026:49 usersMove the mouse over the chart for any month
Ratings count
monthly, 4 months
Latest, 19 Oct 2026:1 ratingsMove the mouse over the chart for any month
The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.
About BookBidder KDP Sync
BookBidder KDP Sync brings your real Kindle Direct Publishing (KDP) earnings into BookBidder, so your Amazon Ads decisions are based on what you actually make. Not just ad spend.
Amazon’s ad console only sees ad spend and ad-attributed sales. It can’t see your organic royalties or Kindle Unlimited page reads, so ACOS alone can make a profitable book look like a loser. BookBidder closes that gap.
With your true royalties in BookBidder, you can finally see real TACoS (ad spend as a share of the income your books actually generate, including KU page-reads) and make bid and budget decisions on real profit instead of guesswork.
What it does:
• Reads your royalties, units sold and KENP page reads from your KDP reports
• Syncs in the background: open KDP once and it keeps your data fresh
• Powers true-profit metrics in BookBidder, including Royalty TACoS
What BookBidder does with it:
BookBidder helps KDP authors run profitable Amazon Ads. It sets bids to your target ACOS, negates search terms that don’t sell, suggests winning keywords to scale, and shows true profit per book. Flat monthly plans from $49, no overage fees.
Privacy:
• Reads your KDP reports within your own signed-in KDP session
• Your KDP data is sent only to your own BookBidder account — never sold, never shared
• BookBidder KDP Sync requires a BookBidder account. Learn more at https://bookbidder.ai/privacy
Get started at https://bookbidder.ai