A billing workspace for invoices, payments and reminders

If you bill clients directly — as a freelancer, a consultant, a small studio or a professional practice — the money almost never arrives the way the agreement described. A fee agreed in one figure turns up as an advance, a milestone payment, and a final amount that lands somewhere between three weeks and three months later.

For the first few clients you keep it in your head. Then a payment arrives that does not obviously match anything, a client asks what is still outstanding, and answering takes a bank statement and an evening. The problem is not that the arithmetic is hard; it is that the record is scattered.

The usual answer is a spreadsheet. Spreadsheets are genuinely good at this until two things happen: the totals stop being trustworthy because someone typed over a formula, and following up still means rewriting the same message from scratch every time.

Umikflow is the same idea with those two failures removed. Payments are entries, so totals are derived rather than maintained; and because the balance is already correct, the follow-up message can write itself.