InvoiceKoi - Showcase Project
Listed October 19, 2026
About InvoiceKoi
Offline invoicing for tradespeople and small service businesses
InvoiceKoi is an invoicing app for self-employed tradespeople and small service businesses. It brings invoices, estimates, receipts, saved clients and a price book together on a phone. Users can add branding, track time, attach job details, scan receipts and share PDFs. Core mobile invoicing works offline; AI features, cloud backup and payment collection need an internet connection. Drafting is free; issuing new documents requires a subscription. The Android app is available now. A separate free browser invoice generator is available on the website.
Project details
Website: https://www.invoicekoi.com/