https://www.invoicekoi.com/us/blog/ Invoicing, estimates and getting paid, for one- and two-person trades. en-US Thu, 10 Sep 2026 09:00:00 +0000 https://www.invoicekoi.com/us/offline-invoice-app/ https://www.invoicekoi.com/us/offline-invoice-app/ Thu, 10 Sep 2026 09:00:00 +0000 Seven things to test without signal, the parts that honestly still need a connection, and a free way to inspect the finished PDF. https://www.invoicekoi.com/us/no-account-invoice-software/ https://www.invoicekoi.com/us/no-account-invoice-software/ Thu, 10 Sep 2026 09:00:00 +0000 What should work before registration, when an account becomes useful, and what to check about privacy, export and recovery. https://www.invoicekoi.com/us/estimate-app/ https://www.invoicekoi.com/us/estimate-app/ Sun, 06 Sep 2026 09:00:00 +0000 An estimate is the document the invoice has to agree with. What carries across when it is accepted, and why converting the same one twice is refused. https://www.invoicekoi.com/us/independent-contractor-invoice/ https://www.invoicekoi.com/us/independent-contractor-invoice/ Sat, 05 Sep 2026 09:00:00 +0000 Nine things belong on the document and the rest is presentation. What they are, how to number and date them, and the terms that get the thing paid. https://www.invoicekoi.com/us/free-invoice-app/ https://www.invoicekoi.com/us/free-invoice-app/ Sat, 05 Sep 2026 09:00:00 +0000 A hundred invoices a year, no card and no trial clock. What free covers, what Pro pays for, and why the line falls where the second person does.