Stolingo

Turn Words into Stories.

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✨ Inspiration

While using popular language learning apps, I noticed I was forgetting most of the words I had learned — simply because I wasn’t getting enough contextual practice.
Then I discovered something powerful: when I saw my known words in multiple sentences — and I already knew the surrounding words — learning became effortless and enjoyable.

That insight led me to start generating my own stories using only the words I had already learned.
It worked wonders for my memory and boosted my reading confidence.
For the past 8 months, I’ve been thinking about turning this into an app — and thanks to the Bolt.New Hackathon, I finally did it.

📚 What it does

Stolingo is a language learning web app that:

  • Lets users learn vocabulary through interactive flashcards
  • Tracks each word they've mastered
  • Allows them to generate custom stories using only their learned words
  • Provides a click-to-translate feature for instant word lookup
  • Builds confidence through reading without unknown vocabulary

It’s like turning your vocabulary list into a personalized reading experience.

🛠️ How I built it

  • Frontend & logic: Built with Bolt.New, allowing for a fast and visual development process
  • Backend: Firestore (Firebase) was used for storing users, vocabulary, and story data
  • LLM Integration:
    • I used LLaMA 4 as the foundation model
    • Served through Groq, the fastest LLM inference platform available today
    • This enabled real-time story generation based on individual vocabulary data
  • Story logic: The app dynamically crafts prompts using the user's current known word list and topic selection

🧱 Challenges I ran into

  • Designing the story generation logic so that it strictly uses only learned words
  • Structuring the Firestore database to manage word tracking and story linking effectively
  • Balancing user-level customization with clean UX
  • Crafting prompts that work reliably with LLaMA 4 while staying efficient in token usage

🏆 Accomplishments that I'm proud of

  • Successfully integrated Groq + LLaMA 4 into a web app for personalized story generation
  • Created a fully functional product that delivers meaningful value to language learners
  • Deployed the app with a custom domain and real user experience — all during the hackathon
  • Built everything solo, from concept to working product, in just a few days

📖 What I learned

  • How to connect real-time LLM generation with user-specific educational data
  • How to structure scalable Firestore schemas
  • How incredibly powerful and fast Groq is for language learning use cases
  • Bolt.New can turn solo ideas into live products blazingly fast**

🔮 What's next for Stolingo

  • 🧩 Adding a fun, interactive module to make vocabulary learning more engaging and game-like
  • 📱 Launching a mobile version for both iOS and Android to reach learners everywhere
  • 🧠 Integrating the Mind Palace technique to boost long-term memory retention through visual association
  • 💳 Adding a payment system to support a freemium model with unlimited story generation and premium features
  • 🌍 Expanding multilingual support and allowing users to customize story tone and genre
  • 🧠 Exploring smarter flashcard personalization based on story reading behavior

🦊 Stolingo is live on the web — and it’s just getting started.

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