言語設定、端末識別子、ローカルのスキャン履歴の保存にブラウザのローカルストレージを使用します。スキャン履歴は利用者の端末内に保存され、端末識別子を除き当方サーバーへ送信されません。広告目的のトラッカーや、Cookieを用いた第三者の解析ツールは使用していません。アクセス状況の把握のため、Cloudflare Web Analytics(Cookieを使用せず、利用者を個人として追跡しないプライバシー重視の解析)を利用しています。
Gand (“we”) sets out below how we handle user information in SUDONE (web.sudone.jp and sudone.jp; the “Service”). The Japanese version of this policy is authoritative; this English text is provided for convenience.
Information we collect
No account: You do not register a name, email, or other identity to use the Service.
Device identifier: A random ID generated in your browser (stored on your device) is sent with requests. It is used only for abuse prevention, rate-limiting, and anonymous usage statistics, and does not identify you personally.
Approximate location (optional): Collected only if you opt in when submitting a store price. Coordinates are converted on our server to a coarse area code (geohash, ~150 m) and the precise coordinates are discarded immediately and never stored.
Scan analytics: Anonymous records of scans (JAN code, whether a match was found, response time). No personal data.
Submitted prices: Store prices you enter, along with an optional store name and an optional approximate area.
Price-drop alert registrations (optional): Only if you enable price-drop notifications, we store the push delivery details issued by your browser (the push service URL and browser-generated encryption keys) and the watched items (JAN code, optional target price), tied to the device identifier. See “Price-drop notifications (Web Push)” below.
Access logs: Standard logs (IP address, timestamp) kept transiently for security and operations.
Looking up prices
To show prices for a barcode (JAN code), we send the scanned product code (not personal data) to marketplace APIs such as Rakuten and Yahoo! Shopping.
Price-drop notifications (Web Push)
Price-drop notifications are strictly opt-in. When you enable them, we store the push delivery details issued by your browser (the push service URL and browser-generated encryption keys) and the items you watch (JAN code, optional target price), tied to the anonymous device identifier. No name, email, or other personal identity is involved. This information is used solely to deliver your price-drop notifications.
Delivery goes through the push service operated by your browser vendor (Google, Apple, Mozilla, etc.). You can turn notifications off at any time in the app, which deactivates the registration; if you revoke notification permission in your browser instead, the invalidated delivery address is deleted automatically.
Cookies and local storage
We use your browser’s local storage for your language choice, the device identifier, and your local scan history. Scan history stays on your device and is not sent to us except for the device identifier. We use no advertising trackers or cookie-based third-party analytics. To understand site usage we use Cloudflare Web Analytics — a privacy-focused tool that sets no cookies and does not identify you personally.
Affiliate links
The Service contains outbound links to Rakuten, Yahoo! Shopping, and similar sites that may include affiliate parameters. Those destination sites may set their own cookies under their own policies. See our Affiliate & Advertising Disclosure.
Sharing and hosting
We do not sell collected information. The Service runs on Cloudflare and a server located in Japan. We do not provide personal information to third parties without your consent except as required by law.
Retention
Price data and anonymous scan analytics are retained to operate and improve the Service. Access logs are deleted after a short period.
Your choices
Location and price-drop notifications are both opt-in; the notification toggle in the app turns alerts off at any time. You can clear your local scan history in the app. For other inquiries, contact us below.
Children
The Service is not directed at children.
Changes
We may update this policy from time to time. Material changes will be posted on this page.
Contact
Operator: Gand (trade name) / Representative: Arda Karaduman (a sole proprietor registered in Chōfu, Tokyo, Japan)
Email: contact@sudone.jp / Web: gand.tr