Tools
Book research for self-publishers: BSR, sales estimates, book age, publisher and niche data on Amazon book pages.
Compare extensions
Tools
Instant KDP insights on Amazon: BSR sales estimates, niche analysis, compliance checks, and quick access to author tools.
Audience & ratings
Store users
2K
692
Ratings
What stands out
AuthorScout (formerly KDP Scout) reports the larger audience. These are store counts. A rating comparison needs a recorded score and rating count for both products.
Category overlap does not establish that two products serve the same workflow.
Product & publisher
Publisher
AuthorScout
bookbloom.io
Publisher portfolio
1 listing
1 listing
Listing status
Active
Active
Manifest
Version 3
Version 3
Package size
231KiB
70.88KiB
Permissions & access
Requested capabilities describe access, not developer intent or a safety verdict.
API permissions
3 requested
- storage
- alarms
- identity
5 requested
- storage
- activeTab
- contextMenus
- scripting
- notifications
Website patterns
11 recorded
- https://www.amazon.com/*
- https://www.amazon.co.uk/*
- https://www.amazon.ca/*
- https://www.amazon.de/*
- https://www.amazon.fr/*
- https://www.amazon.es/*
- https://www.amazon.it/*
- https://www.amazon.co.jp/*
- https://www.amazon.in/*
- https://www.amazon.com.mx/*
- https://kdpscout-backend-production.up.railway.app/*
9 recorded
- https://www.amazon.com/*
- https://www.amazon.co.uk/*
- https://www.amazon.ca/*
- https://www.amazon.de/*
- https://www.amazon.fr/*
- https://www.amazon.it/*
- https://www.amazon.es/*
- https://www.amazon.com.au/*
- https://kdp.amazon.com/*
Releases
Explore the release history
Create an account to compare versions and update timing. Your plan controls history depth.
Create your free accountEvidence behind this comparison
Observed
2 Oct 2026
3 Oct 2026
Store users and ratings are observations, not revenue or lifetime installs. A larger audience or a higher score does not establish product quality.
How Earlygap collects evidenceReplace an extension
Your comparison
2 of 2 selected
AuthorScout (formerly KDP Scout)Tools
BookBloom - KDP Author ToolsTools