Entremigas

Half of Carla's bakery is wholesale: restaurants and cafés that take a delivery every morning and pay weekly or monthly. Each wholesale account is a parent company with its own branches, and every branch wants its own monthly bill, broken down by product, in its own format. That half is what broke Excel. Carla tracked all of it the way most people use Excel: typing each sale into a row, then summing the columns by hand at the end of the month. No formulas. Two hours, minimum. Three if she'd missed a day.

The spreadsheet also had the Argentina problem baked in. IVA math, ARCA reporting, the moment a price changed, the branch that wanted it billed differently. Excel can absorb all of that, but every absorbed exception adds another manual step at month-end. Eventually the workbook is held together by Carla's memory.

Entremigas is built around the way Carla actually works. Four taps to record a sale, on a phone, on a busy bus if she has to. At month-end she opens one screen, picks a month, and downloads the PDFs and the ARCA-friendly CSV. The two-hour ritual is now thirty seconds.

It's a Progressive Web App. Carla added it to her home screen once. No app store, no install, no manual updates. Works offline once it's loaded.