1. Who we are and scope
LeafSail is provided by Shenzhen Xiaodangjia Technology Co., Ltd. This policy covers the LeafSail iOS app, its official website, and customer support. For privacy questions, contact developer@typcb.cn.
The app requires no account and provides no online bookstore or developer-operated cloud sync. It contains no advertising, third-party behavioral analytics, or cross-app tracking SDKs. We do not sell personal information or target advertising based on reading content.
2. Data processed on your device
To enable local reading, the app stores imported book copies, metadata such as titles and formats, custom covers, bookmarks, notes, reading positions, last-read dates, reading duration, and preferences in its local app storage. The app does not upload this information to developer servers.
The app accesses only files or photos you choose through system pickers; it does not scan your entire file or photo library. Imports create a local copy. Custom covers are resized and re-encoded without the original photo metadata. If you select a file from iCloud or another cloud provider, that service may download it first under its own policies. EPUB reading does not load online resources.
Reading duration is measured locally during active foreground reading and pauses for panels, background activity, or prolonged inactivity. Turn off ‘Record reading time locally’ in reading history to stop new duration records; existing records can be cleared separately. Reading position and last-read date are still stored to help you resume reading.
The app also keeps small, local records of effective reading time, the last Pro-page visit, and its reading-time baseline to limit Pro recommendations. These are not uploaded or used for cross-app tracking. Clearing reading-duration statistics does not reset this reminder progress. Pro owners do not receive automatic upgrade prompts.
The welcome offer start time, latest validation time, and expiry status are stored only in this device’s Keychain. They are not uploaded, synced across devices, or used for cross-app tracking. This record may survive app deletion and reinstallation to prevent repeatedly restarting the offer window. No offer is displayed if eligibility cannot be read or saved.
3. Purchases and restoration
Pro is a one-time, non-consumable in-app purchase processed by the Apple App Store, not an automatically renewing subscription. The app uses StoreKit to verify transactions and read entitlements to unlock features and restore purchases. It does not receive your Apple ID email, card details, or payment password, or send transaction information to developer servers.
Apple processes information for purchases, payments, refunds, and system services under Apple’s privacy policy and applicable terms. Purchasing and restoring may require an internet connection.
4. Exporting, sharing, and contacting us
Only when you choose to export or share notes does the app generate text and send it to the file location, app, or recipient you select. That recipient processes it under its own policies. Copies you share are not removed when you delete data inside LeafSail. A notes export is not a full library backup.
If you email support, we receive your sender address, message, and any device details, screenshots, or attachments you voluntarily provide. We use these to answer, troubleshoot, and handle your request. Avoid sending sensitive payment details, passwords, or entire private books. We may use email service providers to handle requests; we do not use support messages for advertising campaigns.
5. Website hosting and network information
Cloudflare hosts this website. Your browser connects to it when you open a website or online policy link; ordinary offline reading does not require a connection to the policy website. To deliver pages and maintain security, Cloudflare may process IP addresses, access times, requested paths, and browser or device network information. We include no advertising cookies, behavioral analytics scripts, tracking pixels, or online forms in these pages.
Cloudflare’s global network may process website requests outside your country or region. Network security data is processed and retained according to the service configuration and Cloudflare’s privacy policy. We have not enabled website analytics scripts or sent books or notes to Cloudflare. Necessary network and security processing is separate from local reading data in the app.
6. Retention, deletion, and backups
Local books and associated data remain until you delete them. Deleting a book removes its app copy, custom cover, bookmarks, notes, reading position, and associated duration statistics, without deleting the original external file. Clearing duration statistics does not delete books, notes, reading positions, or last-read dates.
Using iOS ‘Delete App’ removes that installation’s local data; ‘Offload App’, which preserves documents and data, is different. iCloud or computer device backups may retain copies depending on your settings, and restoring a backup may restore old data. Manage backups in system settings and retain original books and needed notes before deleting the app. We cannot restore your local library from a server.
Support messages are kept only as needed to resolve requests, provide follow-up, handle disputes, or meet applicable legal obligations, and are then deleted or de-identified. You may email a deletion request; we will explain any legally required retention. Apple purchase records and Cloudflare network data are managed by those providers under their policies; deleting app data does not delete those providers’ records.
7. Your choices and rights
You can decline file or photo selection and use features that do not require that content, manage local data, stop duration recording, and choose whether to purchase Pro, share content, or contact support. There is no developer account to close.
For information you provide through support, email us to request access, correction, deletion, restriction, or withdrawal of relevant consent. Depending on applicable law, you may also have rights to object, receive portable data, or complain to a supervisory authority. We request only information needed to verify a request and respond within applicable legal time limits. Withdrawal does not affect lawful processing already carried out.
We process relevant information as needed to provide requested features or support, based on your choices or consent, our legitimate interest in website security, and applicable legal obligations, as permitted by your local law. We cannot remotely access or delete books and notes stored only on your device.
8. Children, security, and changes
Minors should use the app with a parent or guardian and obtain any consent required by applicable law before purchasing or providing personal information to support. We do not intentionally solicit personal information from children; contact us if support receives information about a child that should not have been collected.
We use measures such as system sandboxing, limited access, and HTTPS to reduce risks. Please also protect your device, backups, and exported copies. No technology can guarantee absolute security.
Updates to this policy are dated on this page. If we introduce cloud sync, uploads, or other material changes to processing, we will provide appropriate notice before enabling them and obtain consent where legally required, alongside updates to in-app information and store disclosures. Updating this page does not automatically grant new app permissions.