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KindleScope — KDP Niche Research for Amazon.co.jp

Chrome extension by fuku.business12 · Productivity · Tools

  • Trader

A Chrome extension in Productivity · Tools with 3 users, barely installed.

Specific sites only: 2 match patterns.

What the developer says, and 1 screenshot

Loading from the Chrome Web Store. Open the listing if it does not appear.

Users
3
Rating
not rated yet
Users, last 16 days
+3
Version
1.0.0
Updated in the store
2026-07-23
Published
2026-07-23
Manifest
V3
Browser access
1 permission, 2 site patterns

How it has moved

Users
+3 since 31.08
0-3 · 6 readings
  1. 2026-08-310
  2. 2026-09-032
  3. 2026-09-062
  4. 2026-09-083
  5. 2026-09-100
  6. 2026-09-153
Users
+3 since 31.08
0-3 · 6 readings
  1. 2026-08-310
  2. 2026-09-032
  3. 2026-09-062
  4. 2026-09-083
  5. 2026-09-100
  6. 2026-09-153

A dot marks a day the store showed a different number. Between them the line carries the last one forward: we read every listing more than once a day and record a point only when something moves. History beyond ninety days is in the app.

What it can reach

Specific sites only: 2 match patterns.

  • https://www.amazon.co.jp/*
  • https://completion.amazon.co.jp/*
  • Store data in your browser storage

The full permission history for this extension

What changed recently

Nothing has moved on this listing since we started watching it.

The publisher

fuku.business12 publishes 11 listings we track, 42 users between them.

  1. ChatSave — Export ChatGPT & Claude to Markdown fuku.business12 · Productivity · Tools · published 2026-08-03 9 users
  2. AI Chat Command Center — Search, Organize & Backup ChatGPT & Claude fuku.business12 · Productivity · Tools · published 2026-07-25 5 users
  3. Folders & Pins for Claude — Chat Organizer fuku.business12 · Productivity · Workflow · published 2026-07-22 4 users
Show 5 more from this publisher
  1. LocalSnips — Text Expander (No Account, No Subscription) fuku.business12 · Productivity · Workflow · published 2026-07-26 3 users
  2. ココナラ出品者ノート — 定型文・案件管理・売上メモ fuku.business12 · Productivity · Workflow · published 2026-07-23 3 users
  3. Time Nudge — Screen Time Reminders, No Blocking fuku.business12 · Lifestyle · Well Being · published 2026-07-22 3 users
  4. シメキリ校正 — Webライター納品前チェッカー fuku.business12 · Productivity · Tools · published 2026-07-23 3 users
  5. Bulk Manager for ChatGPT — Delete & Archive Chats fuku.business12 · Productivity · Tools · published 2026-08-03 3 users

Like this one

Listings the catalog judges closest in what they say they do.

  1. KDP Metric — Amazon Book Niche Research Describes nearly the same job, smaller audience 190 users ★ 5.0
  2. BookScope — KDP BSR & Sales Estimates Describes nearly the same job, smaller audience 2 users
  3. KDP Pro - Amazon KDP Researcher Describes nearly the same job, smaller audience 92 users ★ 4.2
  4. Royalty Guild Market Analyst Describes nearly the same job, smaller audience 113 users ★ 5.0
  5. KDP Quick Insights — Amazon BSR, Sales Estimator & Niche Research Describes nearly the same job, smaller audience 46 users

The top 5 only. The full comparison, with why each one is close, is on the alternatives page; ranking a whole neighbourhood by your own criteria is in the app.

Is this your extension?

Connect it to Ext Ops Panel and see installs, uninstalls and uninstall reasons as events arrive, not as a weekly summary.

See what the panel does

Figures come from our own daily pass over the public Chrome Web Store listing, last read on . We publish no contact details for extension developers.