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The udhaar bahi under the counter is still how most of Nepal's shops keep credit, and the hills lose signal often enough that any till needing a connection is a till that stops.

A counter in Nagpur bills in Marathi, one in Coimbatore in Tamil, and both want the same thing from the software: a bill in hand before the customer has put their wallet away.

Ten shops here bill in taka, not rupees — and they do because somebody fixed the currency, not because they configured it. That is the whole point of picking the country at signup.

Urdu reads right to left and most billing software does not, so the reminder that reaches a customer's phone arrives with its numbers and its script arguing with each other.

Five shops signed up from here without anyone selling to them, and every one of them bills in afghani because the country picker resolves a currency rather than assuming a default.

Billing that finishes on the phone, with the server told afterwards, is worth more where the connection is the least reliable part of the shop.

Rs here is the Sri Lankan rupee and Rs in Kathmandu is the Nepali one; the code beside it on every report is what stops a two-country group reading one set of books as the other.

The ngultrum runs at par with the Indian rupee and is still not the Indian rupee, which is exactly the kind of distinction a default swallows.

A shop staffed by workers from four countries needs each of them to have their own login and to see only their own till — which is a permissions question, not a language one.

The pound sign in front of an Egyptian price is not sterling, and a report that only prints the glyph leaves the reader to guess which pound they are looking at.

The dinar is one of the few currencies quoted to three decimal places, and rounding it to two is a rounding error that compounds across a day of small sales.

Where the power and the network both come and go, the till that matters is the one that has already finished the sale by the time either of them returns.

Prices that move week to week make the purchase price on a product the number worth keeping, because a margin computed against last season's cost is fiction.

Twelve regions since the 2015 reform, and software still shipping the old sixteen is a good early sign of how recently anyone looked at it.

A wilaya is a long way from the next one, and a shop that has to drive to reconnect is a shop that needs the day's takings to be right on the phone in its hand.

Sabah and Sarawak sit across a sea from the peninsula, which is the sort of thing mapping software quietly drops and a business there notices immediately.

The CFA franc is shared across eight countries, so the currency alone does not tell you which country's books you are reading — the country does.

The shilling has no subunit in practice, so a ledger that insists on two decimal places is adding two digits of noise to every line of it.

Two currencies circulate side by side here and both print a dollar sign, which makes the three-letter code on a report the only thing separating them.

One shop, the furthest from where this was built, and it bills in convertible marks — which is the whole test of whether the country picker is real.

The euro, on an island small enough that the whole country fits inside one Indian district — and the same free app either way.