GST Book Tax Calculator App

GST Book — Simple GST Calculator & Billing App

GST Book is a fast, accurate GST calculator built for Indian business owners, shopkeepers, and traders. Instantly compute GST-inclusive or GST-exclusive amounts and view automatic CGST, SGST, and IGST breakdowns for common rates (3%, 5%, 12%, 18%, 28%). Create quick bills, generate kacha bills with your business details, save calculation history, and share invoices as PDF or via WhatsApp — all with offline support.

Perfect for retailers, wholesalers, freelancers, accountants, and service providers, GST Book simplifies daily tax calculations and billing tasks with a lightweight, reliable interface tailored to Indian GST needs.