Privacy policy
Evidence scope: Official public App Store metadata and disclosure for version 1.2.1, verified on 2026-08-25. Unknown pre-release behavior is marked TODO and is not treated as permission to ship it.
- DATA COLLECTED BY DEVELOPER
- Verified: no data is collected by the developer in the audited build
- ACCOUNT
- No account required
- ANALYTICS
- No analytics
- TRACKING
- No cross-app or cross-site tracking
- ADVERTISING
- No advertising
- PUSH NOTIFICATIONS
- TODO — verify against the release build
- DEVELOPER SERVER / API
- No developer-operated server or API calls
- CLOUD SYNC
- No cloud sync
- THIRD-PARTY SHARING
- No developer sharing with third parties
- CORE EXPERIENCE
- Works offline
Local data and storage
- User-entered calculation inputs
- Custom Golden Ratio and Fibonacci ratio libraries
- Display preferences
Storage: Calculation inputs, custom ratios and display preferences remain on the user's device.
Retention: Local inputs and preferences remain until the user changes them or removes the relevant app data.
User controls
TODO — document export, deletion and reset controls before App Review.
Purchases and subscriptions
The App Store presents and processes the Annual Pro and Lifetime Pro options. Apple handles account, transaction and payment data; the app does not receive payment credentials.
Contact
Developer / Publisher: Zhiyuan Jiang (Jiang Finance).
For privacy questions or a request concerning developer-held data, email [email protected]. If the Registry states that the developer collects no data, the publisher may have no account or server record with which to identify a user.
These items are deliberately unresolved and must be confirmed by the publisher before submission or the next update:
- Keep the public privacy record and App Store privacy answers aligned with every future release binary.