---
title: "二重価格・価格履歴 景表法チェック Shopify App Profile"
description: "In Japan, a struck-through regular price next to a sale price should be backed by recent selling records under the Consumer Affairs Agency guideline \\(the 8-week rule\\). The app records your catalog's offered prices from the day you install, checks each dual-price display against the guideline, flags displays your history does not support, and drafts the joint-disclosure stating when and how long the price was offered. Products scope only: no orders, no customer data. Not legal advice."
canonical_url: "https://shoplist.co/shopify-apps/priceproof-"
markdown_url: "https://shoplist.co/shopify-apps/priceproof-.md"
last_updated: "2026-10-31"
entity_type: "shopify_app"
slug: "priceproof-"
source: "public Shopify app profile allowlist"
---

# 二重価格・価格履歴 景表法チェック Shopify App Profile

> In Japan, a struck-through regular price next to a sale price should be backed by recent selling records under the Consumer Affairs Agency guideline \(the 8-week rule\). The app records your catalog's offered prices from the day you install, checks each dual-price display against the guideline, flags displays your history does not support, and drafts the joint-disclosure stating when and how long the price was offered. Products scope only: no orders, no customer data. Not legal advice.

## Quick answer
二重価格・価格履歴 景表法チェック has 0 detected stores in Shoplist. This Markdown profile displays 0 public brand examples; it is not a complete customer list.

## Key facts
- Name: 二重価格・価格履歴 景表法チェック
- Monitoring status: First-adopter watch
- Developer: PriceProof
- Developer profile: https://shoplist.co/app-developers/priceproof2
- Shopify App Store URL: https://apps.shopify.com/priceproof
- Website: https://priceproof.app
- Launch date: July 31, 2026
- Shoplist category: Customer Support
- Free plan signal: Yes

## Pricing summary
Free: Free; Unlimited: $9.99/month

Shoplist has not yet found reliable public storefront evidence connecting a Shopify store to this app. This does not mean the app has no users. Some apps are new, admin-only, server-side, theme-independent, or otherwise difficult to detect from public storefront signals.


## Shopify App Charts
Placements in the week of November 2, 2026 (published Mondays; ranks are the published chart rows, not computed here).

| Chart | Rank | Change | Value | Chart page |
| --- | --- | --- | --- | --- |
| Pricing moves in Legal | \#16 | NEW | 0 stores \(estimated\) | https://shoplist.co/shopify-apps/rankings/store-management-security-legal/pricing-moves |

How the charts are built: https://shoplist.co/shopify-apps/rankings/methodology

## App Signals
As of November 4, 2026:

- Stores running it: 0, 0.0% of the stores Shoplist tracks
- Store movement, last 28 days: +0 new stores, +0 returning, −0 removed, net 0 (estimated)
- Primary App Store category: Legal, #485 (14-day median position)
- Listing reviews: 0

## Public callouts
- 価格履歴を初日から自動記録 — 全カタログの提示価格を、インストール時と価格変更のたびに記録します。
- 8週間ルールでチェック — 消費者庁ガイドラインに照らし、履歴が裏付けない二重価格表示を理由付きで検出。
- 提示価格の履歴のみを使用 — 注文・顧客データは扱いません（通常価格の基準は「販売していた」提示行為）。
- 併記文の自動提案・表示バッジ・監査CSV — 記録した履歴からの事実のみ。バッジとCSVは有料プラン。
## Shopify App Store categories
- Legal

## Data note
Profile updated: October 31, 2026. This is the profile revision date, not a guarantee that every store was checked on that date.
Public snapshot built: 2026-11-04 16:22:32.445838\+00
Detection metrics refreshed: 2026-11-04 10:00:00.233104\+00
Public app evidence date: 2026-10-31 07:25:02.787728\+00
This generated Markdown profile intentionally exposes only public, stable app-profile fields and a small public app-stack sample from Shoplist. It excludes private contact data, people data, internal scores, crawl provenance, full datasets, and unstable operational fields.

## Related links
- [HTML app profile](https://shoplist.co/shopify-apps/priceproof-)
- [Shopify apps directory](https://shoplist.co/shopify-apps)
- [Shoplist data methodology](https://shoplist.co/data-methodology.md)