Mcat (hereinafter referred to as "the Software") is a local desktop reading application that allows users to read e-books, documents, images, and other content. This User Agreement (hereinafter referred to as "this Agreement") sets forth the rights and obligations between the User and the Mcat team (hereinafter referred to as "the Developer").

Please read this Agreement carefully before purchasing, installing, or using the Software. By purchasing, installing, copying, or using the Software, the User signifies that they have read, understood, and agreed to be bound by all terms of this Agreement. If the User does not agree to any term of this Agreement, they must not purchase, install, or use the Software. If the User is a minor under the age of 18, they should read this Agreement under the guidance and supervision of their parents or legal guardians and obtain their guardians' consent to use the Software.


1. The intellectual property rights in the Software belong to the Developer and are protected by the Copyright Law of the People's Republic of China and relevant international treaties.
2. The intellectual property rights in the open source libraries and components used by the Software belong to their respective owners, and their use is governed by the corresponding open source licenses.
3. The intellectual property rights in the e-books, documents, and other content read by the User through the Software belong to the respective content creators or their lawful licensees.
4. The User retains all intellectual property rights in the content they upload through the Steam Workshop. The User grants the Developer and Valve Corporation (the operator of Steam) a non-exclusive, royalty-free, worldwide license to reproduce, display, distribute, and store such content solely as necessary to provide the Workshop functionality. The User may delete their uploaded content at any time, upon which this license automatically terminates.
5. The open source components used by the Software are licensed under their respective open source licenses. The license grant of this Software does not affect the rights the User obtains under the applicable open source licenses.


1. The Software is commercial software. The User must pay for it through the Steam platform to obtain a usage license.
2. Upon purchasing the Software, the User obtains the right to install and use the Software on their personal devices.
3. The Software license is bound to the User's Steam account.
4. The User shall not transfer, rent, lend, or sublicense the Software to any third party.


1. Prohibition on Reverse Engineering: The User shall not reverse engineer, decompile, disassemble, or attempt to extract the source code of the Software, except where expressly permitted by law.
2. Prohibition on Modification: The User shall not modify the Software, except where expressly permitted by law.
3. Prohibition on Distribution: The User shall not distribute, transmit, or make available the Software's installer by any means.
4. Prohibition on Cracking: The User shall not use any means to circumvent the Software's license verification mechanism.


5.1 Local Reading
The reading functions provided by the Software operate offline on the User's local device and do not rely on cloud servers to process User content.

5.2 Local Storage
The User's reading history, notes, highlights, settings, and other data are stored solely on the User's local device. Without the User's authorization, the Software will not upload or synchronize this data.

5.3 Steam Cloud Synchronization
The User may optionally use the Steam Cloud synchronization feature to sync settings data to Steam servers. This feature requires the User to actively enable it, have an internet connection on their device, and be logged into their Steam account.

5.4 Steam Workshop

1. The User may browse, search, and download content from the Steam Workshop.
2. The User may upload their own creations to the Steam Workshop to share with other users.
3. The User may subscribe to or unsubscribe from Workshop items.
4. Content uploaded to the Workshop must comply with the relevant rules of the Steam Workshop.

5.5 Local Area Network (LAN) Transfer

1. The User may start the LAN transfer service to share book files within the same network.
2. Data generated during the transfer is transmitted only within the User's local area network, does not go through the internet, and does not connect to any external servers.

5.6 WebDAV Cloud Synchronization

1. The User may configure WebDAV to connect to third-party cloud storage services.
2. The User must configure the server address, username, and password themselves.
3. Data transmission occurs through the third-party server configured by the User.

5.7 Private Space

1. The User may set a password to protect a private space, which is used to store book content that requires encryption. All data in the Private Space is stored locally and will not be uploaded online.


1. By default, the Software does not collect any personal information. All reading history, notes, settings, and other data are stored solely on the User's local device.
2. When the User actively uses the Steam Cloud Synchronization or WebDAV features, relevant data will be sent from the User's device to Steam servers or the third-party WebDAV server designated by the User. Such transmission is initiated by the User. The Developer is not responsible for the data handling practices of third-party servers.
3. The Software may, with the User's authorization, collect crash logs, usage statistics, and similar information. However, it does not upload this data.
4. The Software does not embed any third-party analytics SDKs, advertising SDKs, or tracking code.

If any data collection becomes necessary in the future due to software updates, the Developer will separately notify the User in a prominent manner and obtain consent.


1. The Software is provided "AS IS", without any warranties of any kind, either express or implied, including but not limited to warranties of merchantability, fitness for a particular purpose, or non-infringement.
2. The Developer shall not be liable for any direct or indirect damages arising out of the use or inability to use the Software, including but not limited to data loss, business interruption, loss of anticipated profits, or other commercial losses.
3. The legality, truthfulness, and accuracy of the e-books, documents, and other content read by the User through the Software are the responsibility of the content provider. The Developer assumes no responsibility for such content.
4. The Software may contain links to third parties or integrate third-party services (e.g., Steam Cloud Sync, WebDAV, etc.). The Developer is not responsible for the actions, content, availability, or data security of third-party services. The User should comply with the respective agreements of third-party services when using them.
5. Content in the Steam Workshop is uploaded by users. The Developer is not responsible for its legality or truthfulness. However, upon receiving a legally compliant notice of infringement, the Developer will take measures such as blocking or banning in accordance with the law.


1. The refund policy follows the refund rules of the Steam platform. The User may apply for a refund within 14 days of purchase and with less than 2 hours of use. After a refund, the User's usage license automatically terminates, and the User shall uninstall and cease using the Software.
2. The Developer provides limited technical support. The User may contact the Developer through feedback channels. The Developer will make reasonable efforts to respond to the User's technical questions within 14 working days, but does not guarantee a resolution to all issues.


1. The Developer reserves the right to modify, suspend, or terminate the Software or any of its functions at any time. For major functional changes or termination of the service, we will post a notice at least 30 days in advance within the Software or via Steam announcements.
2. The Developer may update any term of this Agreement without prior notice. The updated Agreement will be published in the Software.
3. If the Software ceases operation, we will notify the User in advance and make reasonable efforts to provide the User with a reasonable period to export their data.
4. The Developer shall not be liable for any failure to operate normally or service interruption caused by force majeure (including but not limited to natural disasters, war, changes in policies or laws, government actions, network failures, third-party service interruptions, etc.), but will make every effort to mitigate the losses caused to the User as a result.


1. If the User breaches any term of this Agreement, the Developer has the right to terminate the User's license and reserves the right to pursue legal liability.
2. If the Developer suffers losses due to the User's breach, the User shall bear the corresponding compensation liability.
3. Any consequences arising from the User uploading infringing content to the Steam Workshop shall be borne solely by the User.


1. The formation, execution, and interpretation of this Agreement shall be governed by the laws of the People's Republic of China.
2. Any dispute arising from this Agreement shall first be resolved through friendly negotiations between the User and the Developer. If negotiation fails, either party may submit the dispute to the competent people's court in the location of the Developer.


1. If any term of this Agreement is held to be invalid or unenforceable, the remaining terms shall continue in full force and effect.
2. The Developer's failure to enforce any right or provision of this Agreement shall not constitute a waiver of such right or provision.
3. This Agreement constitutes the entire agreement between the parties regarding the use of the Software and supersedes any prior oral or written communications, promotions, or statements.
4. If there is any ambiguity in the terms of this Agreement, it shall be interpreted in accordance with relevant laws and regulations.


1. If you have any questions about this Agreement or need to exercise your data rights, please contact us through the following channels:

Steam Store Page
Email: 3152465886@qq.com