InvoiceKoi

InvoiceKoi is an Android invoicing app for tradespeople and small service businesses, with AI assistance for preparing business documents. Create invoices, estimates and receipts, save clients and rates, track time and share PDFs. Core drafting and records work offline; AI assistance, cloud backup and payment collection need internet. Drafting is free, while issuing new documents requires a subscription. Regional prices appear in Google Play before purchase. Designed for service work away from a desk: keep clients, rates, records and totals available offline, then share PDF documents. AI assistance supplements the workflow when online. The website also has a separate free browser invoice generator. Developed by Fang Ventures Private Limited in Singapore. The service is accessed through its website and is intended for the use case described above. Its stated workflow and available outputs are described in the product materials; users should review the site for current availability and account requirements. Pricing advertised in the submission: paid; the submission states that a trial or introductory option may be available. A practical limitation is that generated or analytical outputs may require human.