AI-Powered Reading Companion

Redia currently supports the following formats:

• PDF documents: Papers, books, reports, and more
• EPUB e-books: Common e-book format
• Web articles: Simply enter a URL to capture content

Redia uses state-of-the-art AI language models for translation, delivering high accuracy.

More importantly, we provide line-by-line alignment, allowing you to verify the original text against the translation at any time to ensure accuracy of critical information.

Redia requires an internet connection for AI translation and analysis features.

However, once a document has been processed, you can read the processed content even with a poor connection.

We are currently planning educational discount programs. Stay tuned!

If you are a student or educator, feel free to join our Discord community for the latest updates.

If you experience any of the following frustrations when reading foreign-language literature, the Master plan is designed for you:

• Tired of switching between windows: Are you fed up with constantly copying, pasting, and switching between your PDF reader and web translation/ChatGPT, feeling like your reading flow is always interrupted?
• Want more control over translations: Is web translation quality inconsistent, and rewriting prompts every time you want ChatGPT to translate in a specific style (e.g., "academic" or "concise") too tedious?
• Worried about translation accuracy: For critical terms and sentences, do you always want to quickly cross-reference the original text to ensure the AI hasn't "over-interpreted" or mistranslated?

Redia Master solves these problems right in the reading interface. We provide a unified, efficient bilingual reading environment. You can save your preferred translation styles as custom filters and apply them with one click.

The upcoming sentence-by-sentence alignment feature will give you even more confidence in every translated line.

Great question — this gets to the core advantage of our architecture.

When you paste a long document directly into a conversational AI, it often unconsciously shortens or summarizes the content to fit a single response, even if you ask it not to. This can result in incomplete translations. Moreover, the longer the text processed at once, the more likely the AI is to make contextual errors, affecting accuracy.

Redia fundamentally solves this problem. Instead of feeding the entire article to the AI at once, we first understand the full context, then process it sentence by sentence with precision. This ensures two things:

1. No content reduction: Your translation is a 100% faithful, complete representation of the original — nothing is lost.
2. Higher accuracy: By working with smaller processing units, the AI can focus better on contextual details, dramatically improving translation accuracy and fluency.

In short, ChatGPT is like a generalist who helps occasionally, while Redia is a professional tool purpose-built for deep, long-form translation reading.