KAROBAR · PART 2 · OCTOBER 2026
A correct invoice is not yet a working shop. In October, Karobar had to print on the printer the shop already owns, send a bill the way customers actually want it, and let someone try the whole thing without talking to anyone.
Billing and shop software requested by a restaurant owner in Melbourne, tested first with Pakistani shops, and now growing into an international SaaS product for Australia and Europe.
October 2026 turned the foundation into something a shop could run on: printed receipts, an Android app, bills sent on WhatsApp, returns, an online shop and a public demo. Most of the work came from watching how a counter really behaves.
Shops print on small receipt printers, on A4 and on their own printed letterhead. We added all three. For letterhead, the owner uploads their page and the system detects how much space to leave at the top and bottom, so nobody has to measure margins and waste paper.
Paid messaging services add a monthly cost that small shops notice. Karobar instead opens the shop’s own WhatsApp or SMS with the bill ready to send. Email goes out from the shop’s own Gmail, with send-only access and encrypted tokens. Each bill can also have a public link, protected by its own secret, so a customer can open it without an account.
Cancelling a whole bill is easy. The real case is a customer bringing back two items out of five, after paying part of the bill. Karobar takes back only those items, then corrects stock, profit and the customer’s balance, and pays money back only for what was paid beyond the bill’s new value. The same logic works in reverse for goods sent back to a supplier.
Small business owners rarely book demos. So we built a public demo shop with a record limit that resets every night, followed by a prices page. Anyone can make a few test bills and feel the speed before signing up.
Late in the month we also added an online shop: every shop gets its own page, customers order without an app or login, and the owner turns an order into a bill in one tap.
Ask what the customer already owns and already uses: their printer, their WhatsApp, their Gmail. Fitting around those beats replacing them.