IELTS Speaking Simulator

Ace your IELTS Speaking test with our AI simulator. Get realistic mock exams with unique questions and detailed, criteria-based band score feedback. Practice with precision.

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Update (October 2026): This project has grown into Joe Speaking — https://joespeaking.com

The original real-time demo link is retired. Joe Speaking runs on the web, as an installable web app and on iPhone. You can practise Part 1 only, Parts 2 and 3 together, or a full Parts 1–3 mock test with an AI examiner, then review the recording, transcript and feedback and try again. Your first Part 1 is free after sign-in. Band scores are practice estimates, not official IELTS results, and Joe Speaking is not affiliated with IELTS.

The original ChatGPT GPT version below is kept for history.

Inspiration

My viral https://chatgpt.com/g/g-uGueIrCsT-ielts-speaking-simulator and my own study needs inspired me to build a standalone app for realistic speaking practice, which I personally needed.

What it does

It's an AI-powered simulator that provides a full, realistic IELTS Speaking test. It features real-time voice chat with an AI examiner, followed by a detailed band score breakdown and high-scoring model answers.

How we built it

Built with Next.js and Tailwind CSS, the app uses the OpenAI/Gemini API for its conversational AI. A custom Cloudflare Worker provides unique test topics, and the entire project was developed with the help of Claude Code.

Challenges we ran into

The main challenge was managing the high cost and latency of real-time audio processing, which required significant optimization to make the experience seamless and affordable.

Accomplishments that we're proud of

I'm proudest of the seamless, real-time voice conversation and the advanced prompt engineering that makes the AI a strict, but fair, IELTS examiner.

What we learned

I learned to effectively use AI development tools like Claude Code and mastered the art of prompt engineering to guide a language model through a highly structured task.

What's next for IELTS Speaking Simulator

  • Integrate the Gemini API for enhanced performance.
  • Refine the band score evaluation for greater accuracy.
  • Generate feedback based on first principles to teach why an answer is effective.

Built With

  • claude-code
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