Invoices
Say what you did and for whom; get a numbered invoice to print or send.
What it does. You tell it "two days of design for Acme at 450 a day" and it makes INV-0001: the lines, the total, the due date, your details and how to pay. It keeps every invoice and what is still owed.
What its page shows. What you are owed and how much is late, every invoice with Paid, Late or Unpaid, and each invoice laid out to print or save as a PDF.
What it needs. Nothing to connect. The first time, it asks who is billing: your business name, address, email, currency and how clients pay.