Features

STC keeps the books for second-hand sellers: clothes on Vinted, gadgets on eBay, whatever turns up at the car boot. It follows each item from the day it's bought to the day the money lands, and turns that into the figures you need at tax time.

Bookkeeping software is mostly built for businesses that send invoices, and a spreadsheet only copes for so long. STC is made for the bit in between. It already knows what a listing, a return and a platform fee are, so there's no accounting to learn.

I built it for my own selling, and it's open source, so nobody has to take my word for what happens to their data.

Your data

Open source

AGPLv3 licensed, with the source always available to read.

Run it yourself

Self-host it on your own hardware and nobody else sees a thing.

Saved on your device

Changes land on your device first, then sync to the server.

Leave any time

Encrypted backups, and a full export whenever you want to go.

A look inside

Screenshots from the app, filled with demo data. Drag across any of them to compare light and dark mode.

See where you stand

Paid, pending, listed and returned at a glance, with a to-do list of what each item still needs and listings that have gone stale flagged in red.

The STC dashboard showing paid, pending and listed totals, a to-do list and active items

Every item, from draft to paid

Track items across Vinted, eBay, and other resale platforms. Each one moves through a pipeline from draft to listed, sold, shipped and paid, with tracking numbers and payment windows alongside. Reusable listing templates save retyping the same description.

The stock list with items grouped into listings and sold, each with price, profit, status and pipeline

Tax-ready numbers

Net profit after costs, fees, shipping and expenses, earnings by month, and a breakdown by UK tax year and quarter. Export it as CSV when it is time to file.

The tax screen with net profit, revenue, costs, fees, an earnings-by-month chart and a tax year breakdown

Compare your platforms

Revenue, profit, sell-through and fee percentage side by side, so you can see where things actually sell.

A side-by-side comparison of Vinted and eBay revenue, profit, sales and fees

Price it right

Enter what you want to walk away with and see what to list at on each platform once fees and postage are taken out.

The pricing calculator showing what to list at on Facebook, Vinted and eBay to net 25 pounds

Expenses in one place

Packaging, stock, postage labels, mileage. Log them as you go and they feed straight into your tax figures.

The expenses list with categories, dates and amounts