YongduScope
Yongdu is provided by the Yongdu developer. For privacy questions, product support, and data requests, email support@yongdu.top.
This policy covers the Yongdu iOS app and yongdu.top. The app does not require an account with the developer. Optional iCloud features use your Apple Account.
On-device information
Asset names, categories, tags, prices, purchase dates, usage periods, valuations, financing details, ongoing costs, sale records, notes, change logs, and purchase-planning assumptions are stored locally by default. They support cost, equity, depreciation, repayment, and chart calculations. Preferences and cached exchange rates are also stored locally. Asset photos you choose are compressed to a small image and stored locally. They are included in exported backups and, when iCloud sync is on, sync with the asset to your private iCloud database.
The app does not send these asset records to a developer-operated server and does not include advertising-tracking SDKs. Widgets read summaries and related preferences through an on-device App Group.
iCloud and exports
Active Pro users may enable CloudKit sync for assets and their loans, expenses, and sale records in their private iCloud database. Local saves and cloud notifications are processed while the app is open; returning to the foreground checks again. Background notifications wait until the app is active. First sync merges both sides, individual deletions sync, and you choose a version for conflicts. Language, display preferences, and local passcodes are not uploaded; custom category and tag definitions do not sync independently. Apple provides this service under its terms and privacy policy.
Disabling sync or losing Pro does not delete existing local or cloud data. Full backup import and local reset turn sync off without deleting cloud records; re-enabling merges cloud assets. Sync depends on Apple services, your account, and connectivity, and does not replace independent backups. You choose where to save or share JSON/CSV files, which may contain full asset details. JSON import replaces local records; back up first.
Exchange-rate requests
The app requests CNY-based reference rates over HTTPS from ExchangeRate-API (open.er-api.com), refreshing every 24 hours and caching them locally. Requests contain only the base currency code, not asset names, amounts, notes, backups, or passcodes.
As with other network requests, the provider may receive your IP address, request time, and network-protocol metadata. The provider controls its infrastructure and logs; the developer does not control its log-retention periods. iCloud, email, and external websites are also subject to their providers’ policies.
Permissions and security
The local passcode is stored in the device Keychain. Face ID / Touch ID authentication is performed by the system; the app receives the result, not face or fingerprint templates. Manage these features in Passcode & Security. The local lock does not replace device-level security.
Plan-end reminders require notification permission and are scheduled locally. Notifications may contain asset names. Disable reminders in the app, or change permission and preview visibility in iOS notification settings. Core recordkeeping does not require notifications.
Apple processes in-app purchases and payments. The app uses Apple-verified products and transaction status to determine Pro access and does not receive payment-card details. Restoring purchases contacts Apple services. Cancel subscriptions in Apple settings; cancellation does not delete assets or cloud data.
Retention and deletion
Local records remain until you delete, replace, or remove app data. Sold assets are read-only; individual deletions propagate when sync is active. A full local reset requires your local passcode, turns sync off, and removes assets, custom categories, tags, and hidden categories. It retains language, currency, theme, rate cache, and passcode, and does not delete cloud records.
Clearing local data or uninstalling the app does not delete exported files, copies on other devices, or iCloud data. Manage those separately in their storage locations and Apple’s available iCloud controls. The local passcode may remain in Keychain and is managed separately in Passcode & Security. There is no developer account to close.
Information you voluntarily send by support email is used to handle your request and necessary follow-up, and deleted when no longer needed unless retention is legally required. Contact us to request access, correction, or deletion of support correspondence we hold. We cannot remotely read, recover, or delete asset records held only on your device.
Website and email
The website calculator runs locally in your browser and does not submit asset information. The website includes no analytics scripts, advertising scripts, marketing cookies, registration, or asset-upload endpoint. Contact links open your email client; only when you send a message will the developer and email providers receive your address, message, and attachments. Do not send local passcodes, Apple Account passwords, or complete asset backups. The website stores your selected language and theme only in your browser. Clear this site’s browser data to reset them; these preferences are not uploaded.
This website runs on a cloud server. The server and hosting provider may process IP addresses, requested paths, timestamps, and browser information to deliver, troubleshoot, and protect the website. The website does not receive your app asset records.
Updates and contact
We update this page and its revision date when features or data practices change. Where separate notice or consent is legally required, applicable requirements will be followed. Contact the email below for privacy questions or data requests.
Yongdu is provided by the Yongdu developer. For privacy questions, product support, and data requests, email support@yongdu.top.