Snap it, tag it, and the week does the arithmetic.

Coinbramble is a phone app for keeping one weekly budget out of a pile of receipts. This page is every screen you would actually touch in a normal week, and then a list of the things it will not do for you.

Coinbramble's capture screen as a grey wireframe: a viewfinder box and a shutter button.

Point your camera at the receipt. This screen is still a wireframe.

Coinbramble's capture screen as a grey wireframe: a viewfinder box, a shutter button and an amount field.

Take the photo, keep the receipt.

Point your phone at the receipt and the photo stays attached to the entry, so you can check it weeks later without keeping the paper. If there is no receipt, type the amount in and you get the same entry without a picture.

The tagging screen: a receipt thumbnail above a list of categories, with Coffee selected.
The tagging screen: a receipt thumbnail above a list of categories, with Coffee selected.

Give it a category while you still remember.

Pick a category like coffee, transport or groceries, and the entry lands in this week’s budget. You can rename the categories, and a household shares one set of them.

The tagging screen: a receipt thumbnail above a list of categories, with Coffee selected.
The weekly budget screen: the amount left for the week above the last few tagged entries.

See what’s left this week.

The week’s number changes as soon as you save the entry, and the number is what you have left rather than what you have spent. Weeks start on Monday and nothing rolls over, so every week opens on the same amount.

The camera screen is the original wireframe, kept as it was.

What it does not do.

Better to read this now than to find out on Thursday.

It does not connect to your bank. Every entry starts with a photo you take or an amount you type.

It does not read the receipt for you. You enter the amount yourself; the photo is kept so you can check it later.

There is no web app. Coinbramble runs on iPhone and Android, and there is nothing to sign in to on a computer.

It does not split bills. A household shares one budget, not a running tally of who owes whom.

It is not accounting software. There is no VAT handling, no invoices, and nothing an accountant can file.

It does not do monthly or yearly budgets. A week is the only period, and past weeks are there to look at rather than to re-plan.

A few places open every Monday.

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