# Lexcore Enterprises

- **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:** [Raj Kiran](https://cerebralvalley.ai/u/rajkiransharma)
- **GitHub:** https://github.com/Cortina-Lab/sayledger
- **Demo video:** https://www.youtube.com/watch?v=tK9AHPa8AbY
- **Gallery:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1649

SayLedger by Cortina is a voice + vision credit book for small shops.

Problem: hundreds of millions of small shops worldwide still keep customer credit ("udhaar", "tab", "fiado") in a paper notebook. With a customer waiting at the counter, nobody types into an app, so entries are skipped and money is forgotten.

What it does: the shopkeeper holds a button and speaks in their own language ("Ramesh ne do kilo chawal liye, 180 udhaar, aur Sita ne 500 wapas diye") and gets confirm cards — one sentence can hold several entries. They can photograph an old handwritten ledger page and get its rows digitised (unreadable rows are flagged, never guessed), ask the book questions by voice ("kitna udhaar baaki hai?"), see collections by age, get a polite payment-reminder draft in the customer's language (the exact amount is inserted from the ledger; the shopkeeper sends it), produce statement and report PDFs, and count stock from a shelf photo.

Trust by design: the AI only proposes; nothing is saved until the shopkeeper taps Confirm. Every balance and total is calculated in our own code from SQLite, never by the model. Edits and cancellations are kept in an activity log. Works with any currency (tested with INR and USD).

Built during the hackathon: Flutter Android app + FastAPI backend (hosted demo at cortinainfinity.com/sayledger), 42 backend tests, public MIT repo. Startup track: Lexcore Enterprises Pvt Ltd, the team behind the Cortina apps on Google Play.

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- [MuseLaunch](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1652)

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