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Disclaimer

Last Updated: October 16, 2026

Welcome to the BookFun mobile application (hereinafter referred to as “this Application” or “BookFun”). Before using this Application, please carefully read and understand this Disclaimer (hereinafter referred to as “this Statement”). By downloading, installing, or continuing to use this Application, you are deemed to have fully understood and agreed to accept all terms of this Statement.

1. Software Nature and Functional Positioning

  • Pure Local Tool Software: BookFun is a local typography e-reader, study aid, and personal knowledge management tool designed for readers, scholars, and knowledge workers. This Application only provides technical utilities such as CoreText-based dynamic typesetting, realistic gestures and 3D page-turn effects, Markdown progressive authoring and LaTeX formula parsing, AI text-to-speech (TTS) listening assistance, multi-dimensional reading progress and duration statistics, and local and remote personal storage management.
  • No Built-in or Provided Books: This Application itself does not provide, sell, store, upload, or pre-install any book works, novels, text, or audio commercial digital content, nor does it establish any built-in online book download library or commercial novel distribution platform.

2. Content Source and Copyright Liability Statement

  1. Autonomy of Import Actions: This Application supports users in voluntarily importing legally acquired books and documents into their personal device sandbox via “Import from Files,” “Wi-Fi Local Network Transfer,” “AirDrop,” and the system share sheet. Any content read, imported, edited, or managed by the user within the application is acquired, authored, and actively imported by the user through lawful channels.
  2. Copyright Ownership and Warranties: The copyright, intellectual property rights, and related lawful interests of any books, documents, or text imported by users belong to the original author, publisher, creator, or original legal rightsholder. When using this Application to import, store, read, or listen to content, users shall independently ensure that they possess lawful acquisition sources, complete licenses, or that the work has entered the public domain.
  3. Exclusion of Infringement Liability: Any copyright dispute, litigation, or monetary claim arising from the user’s voluntary importation, reading, use, or external dissemination of pirated, infringing, or non-compliant content without lawful authorization from the rightsholder shall be fully borne by the user, who shall assume all legal consequences and financial liabilities. Aicrosoft and its development team assume no joint or several liability whatsoever.

3. Algorithmic Typography and File Encoding Fault-Tolerance Statement

  • Non-Standard Format Fault-Tolerance: This Application has a built-in intelligent encoding detection algorithm and the BookPageSplitter dynamic typesetting engine, supporting Chinese-English mixed typography, punctuation boundary rules, and orphan line control. However, because TXT/EPUB/PDF files circulating on the internet originate from complex sources, they may contain non-standard character encodings (such as corrupted ANSI/GBK/BIG5), invalid control characters, or broken XHTML tag structures.
  • No Typography Guarantee: The Developer makes every effort to enhance parsing compatibility, but makes no 100% absolute commitment regarding the typography rendering, table-of-contents recognition accuracy, or text integrity of files from unknown sources or with severely damaged formats. Layout irregularities, missing fonts, or garbled characters caused by corrupted source file structures are defects of the files themselves and are not considered defects of this Application.

4. Network Storage and Third-Party Direct Connection Disclaimer

  • Peer-to-Peer Communication Architecture: This Application supports users in voluntarily configuring connections to private network storage (such as SMB/NAS) and third-party cloud storage services to achieve personal bookshelf synchronization and data backup. All network connections are peer-to-peer direct communications between the user’s local device and the target storage server; this Application operates no relay servers and does not collect or store user account passwords, access tokens, or file data.
  • Secure Credential Storage: Authentication credentials are encrypted and stored within the system Keychain or the protected application sandbox.
  • Third-Party Service Failure Disclaimer: The Developer assumes no joint liability for service anomalies resulting from third-party cloud storage service failures, network interruptions, API adjustments, or user configuration errors.

5. Online Cover and Metadata Retrieval Service Statement

  • Public Internet Search Tool: The book cover retrieval and intelligent metadata scraping features built into this Application are auxiliary tools provided for users to organize their personal collections using public search engines or open metadata APIs.
  • Non-Commercial Use and Copyright Ownership: The copyright of cover images and book metadata retrieved belongs to the original rightsholders and is provided solely for identification and aesthetic display within the user’s local bookshelf. Commercial use is strictly prohibited.
  • Results Do Not Represent Developer Stance: The Developer undertakes no guarantee regarding the absolute accuracy, artistic quality, or legal compliance of retrieval results. When publicly displaying or sharing screenshots of their bookshelf, users should exercise due care regarding copyright compliance.

6. AI Text-to-Speech (TTS) Service Description

  • Real-Time Auxiliary Presentation Technology: The AI voice reading and text-to-speech (TTS) features provided by the application are real-time auxiliary presentation technologies realized using underlying operating system native engines and public synthesis interfaces.
  • No Data Retention Commitment: This Application retains no text content read or synthesized audio generated on server infrastructure.
  • Availability and Network Fluctuation Disclaimer: The Developer undertakes no guarantee regarding voice synthesis delays, interruptions, or availability changes caused by network fluctuations, third-party service adjustments, or underlying system voice framework modifications.
  • Fair Use Scope: Audio synthesized by users using the voice reading feature is restricted to personal study, reading accessibility, and other fair use contexts. Recording, distributing, or utilizing synthesized audio for commercial gain is strictly prohibited.

7. Data Security and Backup Responsibility Statement

  • Local-First Architectural Principle: BookFun adheres to the “Local-First, Zero-Server” principle; the Developer operates no centralized database and cannot retain or back up your book assets remotely.

  • Backup Recommendations: The application provides local data packaging and cloud backup/restore capabilities. Users should fully recognize the vital importance of data backup and are advised to regularly create multiple backups of essential reading progress, personal notes, and book files.

  • Force Majeure and Data Loss Disclaimer: For loss of book files, reading progress, bookmark annotations, or reading statistics resulting from:

    1. User deletion operations within the device or bookshelf;
    2. Device replacement, flashing, jailbreaking, system reset, OS failures, or hardware damage;
    3. Private cloud synchronization interruptions due to insufficient Apple ID storage or disabled settings;
    4. Discontinuation or API changes of third-party storage services;
    5. Other force majeure events beyond the Developer’s reasonable technical control.

    Aicrosoft cannot assist in retrieving lost data remotely and assumes no direct or indirect liability for the aforementioned data losses. We strongly urge users to safeguard their local original book copies and maintain system-level device backups.

8. User Conduct and Compliance Commitments

Users agree to use this Application lawfully and compliantly, ensuring that all imported, edited, and read documents possess lawful authorization or fall within statutory fair use boundaries. Utilizing this Application to engage in activities infringing upon third-party copyrights, intellectual property rights, or applicable laws (including but not limited to unauthorized recording, production, and distribution of audiobook audio) is strictly prohibited. All infringement disputes, legal liabilities, and financial claims arising from the user’s own unlawful acquisition, importation, or dissemination of unauthorized content shall be borne solely by the user.

9. Delivery Condition (AS IS)

To the maximum extent permitted by applicable law, this Application is delivered “AS IS” and “AS AVAILABLE” for your personal, non-commercial use. Aicrosoft disclaims all express, implied, or statutory warranties, including but not limited to fitness for a particular purpose, merchantability, uninterrupted operation, or error-free performance. Under no circumstances shall the Developer be liable for any direct, indirect, incidental, special, or consequential damages arising from the use or inability to use this Application.

10. Intellectual Property Protection and Contact Us

We place paramount importance on the protection of intellectual property rights and lawful interests. If any rightsholder believes that certain features or technologies in this software infringe upon their lawful rights, please contact us with supporting evidence:

Upon receipt of a valid notice, we will investigate and cooperate in accordance with applicable laws promptly.