This Privacy Policy describes how Ring Sizer (“we”, “us”, or “our”) collects, uses, and protects information when you use the Ring Sizer mobile application (the “App”).
By using the App, you agree to the collection and use of information as described in this policy. If you do not agree, please do not use the App.
## 1. Who we are
Ring Sizer is a mobile utility rated **4+**. It helps you:
- measure ring width on screen
- measure finger width with an on-screen guide
- use a real centimetre / inch ruler
- save size history on your device
- optionally calibrate screen scale with a bank card
- unlock premium features through an optional subscription
For privacy-related questions, contact us at:
**Email:** [email protected]
## 2. Information we collect
We collect only what is needed to run the App and manage subscriptions.
### 2.1 Information stored on your device
- Ring and finger measurements you choose to save
- Optional screen-scale calibration data
- App preferences (for example, onboarding completion and rating prompts)
- Local subscription / entitlement status needed to unlock premium features
Measurement and preference data stay on your device unless you choose to share them outside the App (for example, by taking a screenshot or contacting support).
### 2.2 Purchase and subscription information
If you buy a subscription or in-app purchase, payment is processed by **Apple** (App Store) or **Google** (Google Play). We do not receive your full payment card details.
To verify and restore purchases, the App uses **RevenueCat**. RevenueCat may process information such as:
- an anonymous app user identifier
- purchase / subscription status and product identifiers
- device / platform information needed for entitlement checks
- receipt or purchase tokens provided by Apple or Google
RevenueCat’s privacy practices are described here:
<https://www.revenuecat.com/privacy>
Apple’s and Google’s privacy policies also apply to store purchases.
### 2.3 Information we do not collect
- We do not require a Ring Sizer account or email login to measure sizes
- We do not upload your ring or finger measurements to our servers for analysis
- We do not sell your personal information
- We do not use your measurements for advertising profiles
## 3. How we use information
We use information to:
- show and restore your saved sizes
- apply measurement scale calibration
- remember basic App preferences
- unlock and restore premium / subscription features
- operate and improve Ring Sizer on your device
## 4. Sharing of information
We do not sell personal information.
We share information only with:
- **Apple / Google** — for app distribution and payments
- **RevenueCat** — for subscription and entitlement management
- others only if required by law or to protect our rights, safety, or property
## 5. Data retention
- Saved sizes, calibration, and preferences remain on your device until you delete them in the App or uninstall the App
- Purchase and subscription records are retained by Apple / Google and RevenueCat according to their policies and as needed to provide restore / entitlement services
## 6. Children’s privacy (4+)
The App is designed for a general audience and is rated **4+**.
We do not knowingly collect personal information from children. Measurement data remains on the device. Purchases may require an adult’s App Store / Google Play account and parental controls (for example, Ask to Buy).
If you believe a child has provided personal information to us inappropriately, contact us and we will help address it.
## 7. International users
Measurement data is processed locally on your device. Purchase and subscription data may be processed by Apple, Google, and RevenueCat in the countries where they operate.
## 8. Changes to this policy
We may update this Privacy Policy from time to time. Continued use of the App after changes means you accept the updated policy. The “Last updated” date at the top will change when we revise this document.
## 9. Contact us
If you have questions about this Privacy Policy or Ring Sizer:
**Email:** [email protected]