Jack of Hearts
Product
Built for the person on the other side of the counter.
KOSHI started as a problem heard in agro-retail shops and reached the Play Store ten weeks later, with 700+ retailers signed up.
Hands played
KOSHI, a second brain for agri-input retailers
700+ retailersA farmer walks into the shop only when a need arises. The retailer who knows which farmer sowed what, and when, can reach out first. KOSHI holds that memory: billing, credit and farmer books, crop calendars for a hundred crops across Gujarat's five zones, and Gujarati posters checked against the product label before they go out on WhatsApp.

Posters 
Crop calendars 
Farmer book Discovery before design
Fifty shops firstFifty-plus retailer conversations before a screen was drawn, then pilot shops across five regions of Gujarat. The first feature list came from the counter, not a whiteboard.
The launch-week read-out
The week in numbersOne read-out from GA4, Firebase and the ops console. Five hundred and seventy retailers signed up in the week, four in five finished onboarding, one in three did real work. The drop once hand-holding ended became the next month's plan: a call-and-tutorial program that reached three hundred shops.
The poster engine
Photo in, poster outA retailer photographs a product pack and records a voice note. The engine reads the pack, looks the product up, plans the Gujarati text, draws the poster, reads it back character by character and repairs what is wrong before a person approves it. A poster with a wrong price never leaves, because it goes straight to a farmer WhatsApp group.