One Stop Invoice is a GST invoicing and business billing application for Indian businesses. It creates tax invoices with CGST, SGST, or IGST calculated according to the place of supply, checks GSTIN formats, and supports HSN or SAC details. Invoices can be exported as PDFs or emailed, with amounts shown in Indian rupees and in words. The application also provides dashboards and reports using India’s April to March financial year. The software includes client, inventory, and expense records alongside invoice management. Client profiles can store GSTIN details, invoices, payment history, and outstanding balances. Users can review revenue and collection trends, monitor unpaid balances, and schedule a report pack for their Chartered Accountant. A typical workflow is to enter business details such as the business name, GSTIN, and logo, then add or import clients and create invoices with line items. Client GSTIN details can be reused on subsequent invoices. The service offers a free plan with a monthly limit of 20 documents and a watermark; paid options are listed at ₹1,499 per year or ₹199 per month, including GST, with no per user fee. The website states that One Stop Invoice does not generate IRNs through the NIC portal, file GSTR 1, or create e-way bills. The app is available on the App Store and Google Play.