Refyne

Inspiration

We were inspired by how writing tools today often depend on cloud processing, risking privacy and slowing down real-time creativity. We wanted to build an AI assistant that stays local, protects user data, and still feels personal and responsive. Refyne was born from the idea that powerful language intelligence shouldn’t come at the cost of privacy—or connection.

What it does

Refyne is a real-time, on-device AI writing coach that helps users write better instantly. It corrects grammar, adjusts tone with ToneSync, summarizes and expands text, translates, reads aloud, and learns your style—all without sending data to the cloud.

How we built it

We built Refyne using on-device transformer models fine-tuned for writing assistance tasks. Our pipeline integrates a grammar correction API, ToneSync for tone detection and rewriting, and a summarization engine capable of multiple formats and lengths. We implemented real-time analytics to track word counts and metrics, added text-to-speech for accessibility, and built smart features like Text Expansion, Translation, and Smart Auto-fill—all optimized for local execution to ensure privacy and speed.

Challenges we ran into

Building Refyne fully on-device posed several challenges. Running multiple AI features—grammar correction, tone analysis, summarization, and translation—without cloud resources required extensive optimization. We had to fine-tune lightweight NLP models for speed, manage limited system memory, and ensure the text-to-speech and ToneSync modules worked smoothly together. Designing an interface that stayed responsive despite continuous background processing also tested our real-time architecture.

Accomplishments that we're proud of

We’re proud to have created a real-time AI writing assistant that works completely offline, ensuring user privacy without compromising speed or accuracy. We successfully integrated features like ToneSync for adaptive rewriting, multi-length summarization with text-to-speech, smart auto-fill, translation, and text expansion. Achieving all this while keeping the system lightweight and responsive marks a huge milestone for our team.

What we learned

Building Refyne taught us how to optimize AI models for real-time, on-device performance without relying on the cloud. We learned how to efficiently combine text-to-speech, summarization, tone detection, and translation in a seamless workflow. Most importantly, we realized how empowering users with private, secure, and instant writing assistance can redefine digital communication.

What's next for Refyne

Our next step is to make Refyne even smarter and more personal. We plan to integrate adaptive tone modeling, where the AI learns and mirrors each user’s writing personality over time. We’ll extend multilingual support, improve speech emotion detection, and add mobile and browser integrations so Refyne can be used anywhere—securely and offline. Ultimately, our goal is to make Refyne the most private, context-aware writing companion for every kind of communicator.

Built With

• chrome-extensions-api
• javascript
• localstorage
• react
• web-speech-api