Create professional invoices in 30 seconds - no sign-up, no watermark, no catch. Open QuickBill, fill in your details, export a clean PDF. Done. Free forever: unlimited invoices, 7 currencies, shareable links, saved contacts, dark mode. No account needed. Pro ($2.99/mo): 4 premium templates, custom logo, crypto billing (BTC/ETH/SOL/USDT), email sending with PDF attachment. Built for freelancers and small businesses who want to bill clients without wrestling with accounting software.