Privacy first
Privacy Policy
This policy explains what stays on your device and what is sent for purchases or ads.
1. Calculations and local storage
Eqnora does not require an account. Expressions, results, recent history (up to 30 items), the last answer, angle mode, theme and language settings stay in app-local storage. We do not send calculation content to our server or advertisers. Avoid entering sensitive information in expressions. Depending on your iOS settings, local app data may be included in your device or iCloud backup. Eqnora does not provide its own iCloud sync.
2. Pro purchase verification
When you purchase or restore Pro, the app sends signed store purchase evidence, transaction identifiers and time, platform, app and product identifiers to our HTTPS verification server and the relevant store. The server does not retain raw purchase evidence. It stores SHA-256 hashes of the purchase key and entitlement token, product, entitlement status and verification time to provide Pro, prevent duplicate or fraudulent transactions and respond to refunds. Expressions and payment card numbers are not included. The configured retention period is 3,650 days from the latest update for purchase and entitlement records and 400 days for store-notification deduplication records. Actual deletion of expired records may be delayed by the storage system’s retention processing.
3. Ads and third parties
The free version may show limited interstitial and optional rewarded ads; there are no banner ads. Google AdMob and its partners may process approximate location derived from IP, device identifiers, ad views and interactions, app use, crash and performance data to serve and measure ads and prevent fraud. Actual processing varies by region, consent and SDK settings. See Google’s advertising privacy information and its iOS and Android SDK disclosures. Ad partners may process data outside your country.
4. Consent and choices
Where required, the app uses Google User Messaging Platform for consent. If privacy choices appear in app settings, you can revisit them there. On iOS, after regional ad consent choices, the app may request App Tracking Transparency (ATT) permission where personalized ads are available. Personalized ads may be shown only when permission and the applicable consent choices allow them. If you decline ATT or personalized-ad consent, the app requests non-personalized ads. Such ads can still involve some data processing for delivery, measurement and security. Core free calculations remain available if you decline or an ad cannot load. Pro purchasers do not see ads.
5. Retention, deletion and rights
You can delete local history in app settings. Removing the app removes local app data according to the operating system; copies in your iOS backup follow your backup settings. For access, correction or deletion of purchase-verification records, email stockbackground3@gmail.com. We will explain the minimum order information needed to find the purchase. Records required by law or for fraud prevention are deleted after that need ends. For data processed by Google advertising services, use Google’s privacy choices and deletion procedures.
6. Security and contact
Purchase verification uses HTTPS. The device stores the entitlement token in iOS Keychain or Android Keystore-backed secure storage. Calculation history is protected by the operating-system app sandbox, but is not a separate end-to-end encrypted vault. Contact for privacy requests: 케이제이, stockbackground3@gmail.com. If this policy changes, we will update the effective date here.