Amazon 定価チェッカー icon

Amazon 定価チェッカー

by kazukichi · kazukichi0914.hatenablog.com · Shopping
Established publisherManifest V3 Free
View in Chrome Web Store Data as of 15 Oct 2026

Amazon商品ページで、参考価格（定価）に対して今の価格が高いか安いかをその場で判定して表示します。

Users
5
−4 in 30 days
Rating
5.0 / 5
unchanged in 30 days
Ratings
1
0 in 30 days
Store rank
#243K
#203K among extensions
Version
1.0.1
updated 26 Jul 2026

Users

monthly, 3 months
048Jul 2026Sep 2026Oct 2026
Latest, 15 Oct 2026: 5 usersMove the mouse over the chart for any month

Ratings count

monthly, 3 months
001Jul 2026Sep 2026Oct 2026
Latest, 15 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.

Growth

WindowUsersChangeRatingsRating
7 days−2−28.6%00.00
30 days−4−44.4%00.00

Version history

1 versions recorded
1.0.124 Jul 2026

Details

Category
Shopping
First seen
24 Jul 2026
Size
437 KB
Languages
ja
Pricing
Free
Privacy policy
kazukichi0914.hatenablog.com
Extension ID
ofgdjgfnlnokanbkfaekanhaofjohejb

Permissions and risk

Low riskimpact 1, likelihood 2

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