# Let's choom

- **Event:** [Meta Global AI Developer Hackathon](https://cerebralvalley.ai/e/meta-ai-developer-hackathon)
- **When:** Oct 26, 12:00 PM – Nov 4, 9:00 PM (EST)
- **Where:** Online
- **Team:** [Luu Binh](https://cerebralvalley.ai/u/BinhKen), [Ha Tran](https://cerebralvalley.ai/u/MarcoTran13)
- **GitHub:** https://github.com/marcohatran/Choom-Meta-Global-AI-Developer-Hackathon
- **Demo video:** https://www.youtube.com/watch?v=KrIDFEXITKg
- **Gallery:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/308

Choom is the AI IELTS examiner everyone can afford. About 3.5 million IELTS tests are taken every year (estimate), at around $179 per attempt in Vietnam. Writing and Speaking are the lowest-scoring skills for Vietnamese candidates (5.7 Speaking, 6.0 Writing), and they are exactly the skills that need a human examiner, which most learners can't afford. Centre courses cost $230–960, and essay feedback takes days.

Choom gives every learner an examiner-grade report in under 30 seconds, plus a coach agent that turns those reports into tomorrow's practice:
- Writing examiner: grades Task 1 and Task 2 on the four official criteria, quotes the exact sentences that cost marks, and rewrites the learner's own essay one band higher. Learners can also photograph a handwritten essay.
- Task 1 charts generated on demand, then verified by reading them back with vision.
- Speaking examiner: record in the browser and get fluency metrics (pace, fillers, word variety) and four-criteria bands.
- Coach agent: reads the learner's real scores with tools, writes targeted drills through a sub-agent, and rewrites today's mission.

It is live, public, and needs no sign-up: https://choom-muse-388628850368.asia-southeast1.run.app
Business: freemium, Pro at 149,000 VND/month (~$5.70), under 5% of a centre course. Vietnam first, then Southeast Asia.

## More from Meta Global AI Developer Hackathon

- [Kaagaz_India](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/305)
- [ReproLoop](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/306)
- [v01d.bmv](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/307)
- [Jojo](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/309)
- [Clearbite](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/310)
- [Rockey kotwal](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/311)

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