Invoicing, written down
Plain guides to writing an invoice, pricing the job and getting paid, each one checked against what the app and the generator actually do.
01Everything so far
· 4 min read
How to make an invoice for free and save it as a PDF
Create a free invoice without signing up. Follow a worked example, save a PDF, check the totals, and keep a copy before clearing your browser.
Invoice KoiInvoicing for the trades
· 7 min read
A simple example of an invoice you can copy and adapt
An example of an invoice for one small job: line items, dates, payment instructions and a total you can check, then a blank outline to copy and fill in.
Invoice KoiInvoicing for the trades
· 5 min read
Invoice email templates for sending and following up
An invoice email template to copy for sending, the due date and a follow-up, a short invoice message for text or WhatsApp, and how to attach the invoice.
Invoice KoiInvoicing for the trades
· 3 min read
How to choose an offline invoice app
Seven things to test without signal, the parts that honestly still need a connection, and a free way to inspect the finished PDF.
Invoice KoiInvoicing for the trades
· 3 min read
Invoice software without an account
What should work before registration, when an account becomes useful, and what to check about privacy, export and recovery.
Invoice KoiInvoicing for the trades
· 6 min read
The estimate app that bills what you quoted
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.
Invoice KoiInvoicing for the trades
· 7 min read
How to invoice as an independent contractor
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.
Invoice KoiInvoicing for the trades
· 5 min read
Is Invoice Koi free?
What costs nothing, what needs a subscription, who decides about a free trial, and what you keep if you stop paying.
Invoice KoiInvoicing for the trades
02Examples and comparisons
Invoice templates with a worked job on them, for the work people ask about most: plumber, electrician, photographer, videographer and tutor. All 35 trades are on the templates page.
Choosing an app? Invoice Koi is compared with 12 others feature by feature, including Invoice Fly, Joist and Square Invoices, with where each of them wins.
03 · While you are here
Try it on a real invoice.
Make an invoice free
On Google Play now. Coming soon to iPhone. Have the app? Open it





