An open, efficient desktop reading app that supports multiple ebook and image formats.

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Early Access Software

Get involved with this software as it develops.

Note: This Early Access software is not complete and may or may not change further. If you are not excited to use this software in its current state, then you should wait to see if it progresses further in development. Learn more

What the developers have to say:

Why Early Access?

“Mcat is a desktop reading app with a relatively wide range of features. We chose early access because we want to invite real readers to participate while the core features are already usable and the product is valuable for daily use. Reading experience is highly personal—people’s preferences for typography, interaction, and workflows vary greatly. We hope to hear feedback from real users as the product continues to grow, so that future improvements can better align with actual needs.”

Approximately how long will this software be in Early Access?

“We plan to keep the early access phase around 6 to 12 months, depending on the actual development progress and the pace of community feedback.”

How is the full version planned to differ from the Early Access version?

“The early access version already includes the core capabilities of a reading app. In future development, we plan to continue refining the following areas:

- More file format support

- Workshop

- Performance and compatibility optimization

- Note-taking and knowledge management

- More customization options

- Plugin extension features

- Community-driven features

We don’t want to promise a specific feature list in advance. Instead, with the community by our side, we hope to let Mcat grow little by little into its best possible form.”

What is the current state of the Early Access version?

“The current version is already capable of meeting daily reading needs. We are labeling it as early access, meaning that the core framework of the product is stable, but the fine-tuning of details, coverage of edge cases, and some more ambitious features we want to develop will take time to refine. Note: For detailed feature introductions, please refer to the "About This Software" section.”

Will this software be priced differently during and after Early Access?

“We plan to raise the price appropriately after ending early access. The price during early access is to thank early users for their trust and support. As more features are added and platform coverage expands, the price of the full version will be adjusted accordingly.”

How are you planning on involving the Community in your development process?

“We highly value the voice of the community and plan to stay in touch with users through the following channels:

- Steam Community Hub: As our main forum for discussion and feedback, we will regularly review user suggestions and bug reports.
- Patch Notes & Development Updates: We will share development progress, design ideas, and future plans via Steam announcements.
- Feedback‑Driven Development: We will prioritize the most frequently requested issues from the community, allowing users to directly influence the product's direction.”
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About This Software

Mcat is a desktop reading app designed to provide you with a customizable, efficient, and focused reading experience. All reading features can run offline locally, giving you full control over your data.

Supported formats:

EPUB, PDF, TXT, MarkDown, JSON, HTML, XML, CSV, JPG, PNG, WebP, GIF, CBZ

More formats are planned for future support.

Key features:

  • Customizable typography – Adjust font size, line height, margins, alignment, background color, text color, letter spacing, and more. Supported for both EPUB and plain text readers.

  • Customizable window – Adjust window corner radius, transparency, and optionally hide the window border.

  • Multi-color highlighting – Supports multiple highlight colors and line styles (background highlight, underline, dotted underline, double underline), with customizable text color.

  • Note system – Manage notes for the current book and globally, with quick navigation to note locations.

  • Replacement rules – Supports custom text replacement rules to help clean up typographic noise.

  • Chapter rules – Supports custom chapter recognition rules to adapt to text files in different formats.

  • Noise word filtering – Supports filtering common noise words in text.

  • Style presets – Supports saving and switching between multiple reading style configurations.

  • Local-first – All reading data is stored locally by default, never uploaded to any remote server.

  • Private space – Password-protect sensitive books.

  • LAN transfer – Quickly share books over the same network.

  • WebDAV import – Supports importing books from WebDAV servers.

  • Reading stats – Tracks reading time, word count, and open count, can be disabled in settings.

  • Global search – Supports full-text search across all books.

More features:

Tag management, Group management, Favorites, Reading history, Batch import, Wallpaper & screensaver, Mouse trail, Keyboard shortcuts, Edit mode, Stealth mode

Mcat is still growing steadily. Your feedback will help shape what it becomes next. We look forward to hearing from you.

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

Some code is generated and intelligently completed by AI. Any generated code has undergone multiple rigorous tests.

System Requirements

    Minimum:
    • Requires a 64-bit processor and operating system
    • OS: 64-bit Windows 10 or 11
    • Processor: Intel Core i5-8400 or AMD Ryzen 5 2600x
    • Memory: 8 GB RAM
    • Graphics: -
    • Network: Broadband Internet connection
    • Storage: 4 GB available space
    Recommended:
    • Requires a 64-bit processor and operating system
    • OS: 64 bit Windows 11
    • Processor: Intel Core i7-11700 or AMD Ryzen 5 5600
    • Memory: 16 GB RAM
    • Graphics:
    • Network: Broadband Internet connection
    • Storage: 16 GB available space

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