Privacy Policy

📦 Data Storage

All calibration settings, measurement preferences, and unit choices you configure in RulerApp are stored exclusively on your device using Apple's UserDefaults framework. Your data never leaves your device.

• No cloud sync — data exists only on the device where it was entered
• No backup to RulerApp servers — we operate no servers
• If you delete the app, all data is permanently removed from your device
• Calibration data and unit preferences are stored in UserDefaults, on-device only

🚫 Data We Do NOT Collect

RulerApp does not collect, store, transmit, or share any of the following:

• Personal identifiers (name, email address, phone number)
• Device identifiers (IDFA, IDFV, or any advertising ID)
• Location data
• Usage analytics or behavioral data
• Crash reports sent to third-party services
• Any information whatsoever

📡 No Analytics or Tracking

RulerApp contains no analytics SDKs, no tracking libraries, and no third-party frameworks of any kind. The app makes no network requests for telemetry or data collection purposes.

• No Firebase, no Amplitude, no Mixpanel, no Crashlytics
• No advertising networks or attribution tools
• No A/B testing or remote configuration services

💳 Purchases and Payments

RulerApp is available as a one-time purchase via the App Store. All payment processing is handled entirely by Apple.

• RulerApp never sees, receives, or stores your payment information
• No credit card numbers, Apple ID credentials, or financial data passes through RulerApp
• There are no subscriptions or recurring charges

👶 Children's Privacy

RulerApp does not knowingly collect any information from anyone, including children under the age of 13. Because no data is collected, the app is safe for users of all ages with respect to data privacy.

🔄 Changes to This Policy

If we update this Privacy Policy, the revised version will be posted at this URL with an updated effective date. We will notify users of material changes through an App Store update description.

Continued use of RulerApp after any changes constitutes acceptance of the updated policy.

🇯🇵 日本語プライバシーポリシー概要

RulerAppはお客様のデータを端末内にのみ保存し、外部サーバへの送信は一切行いません。アカウント登録は不要で、個人情報の収集・利用・第三者提供は行いません。

お支払いはAppleのApp Storeを通じて処理され、RulerAppが決済情報を取得することはありません。

本アプリに関するお問い合わせは下記の連絡先までお願いいたします。