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This is a business efficiency web application for sole proprietors, freelancers, and small businesses. It enables a complete workflow from customer registration through quotations, invoices, PDF output, payment management, and receipt issuance. #IndividualDevelopment

Main Features

• Customer Management: Register customer information once and it automatically reflects in quotations and invoices
• Quotation & Invoice Creation: Add/edit line items, support multiple tax rates, apply discounts, select templates
• Amount Calculation: Real-time confirmation of amounts including multiple tax rates, discounts, and partial payments
• PDF Output: Download directly as A4 PDF from 3 design options - Standard / Minimal / Professional
• Payment Management: Register multiple payments, track partial payments and remaining balances
• Receipt Issuance: Automatically generate receipts from fully paid invoices
• Dashboard: View this month's invoice amount, payment amount, and unpaid amount, with 6-month trend graphs
• Auto-numbering: Duplicate quotations and invoices with customizable numbering rules (prefix, digit count)
• CSV Export: Download invoice list, payment list, and customer list in CSV format
• Responsive Design: Operable on smartphones, tablets, and desktops

Features

Try immediately in Demo Mode without registration using sample data. Data is saved in the browser's localStorage and is not sent to any server. Reduces the effort of transcribing quotation contents to invoices and automates complex amount calculations including multiple tax rates and discounts. Invoices with payment history are locked from editing to prevent discrepancies between invoice totals and payment amounts.