BusinessOS just shipped 40 free instant tools — VAT calculator, GST calculator, invoice number generator, freelance hourly rate calculator, break-even, MRR/CAC/LTV calculators, receipt generator, and 32 more. Each runs entirely in your browser, no signup, copies the answer to your clipboard. Plus the full app: private, offline-first, encrypted invoicing + expenses + reports. Voice-to-invoice in 3 seconds. WhatsApp send on every invoice. Free during limited early access.

Business software has a bad habit: it assumes you're always online, and doesn't mind putting your data on someone else's server. BusinessOS is the opposite. Your browser is the app. Invoices, expenses, cash flow, reports — all offline, encrypted on your device. ▸ Voice-to-invoice in 3 seconds ▸ WhatsApp send on every invoice ▸ Multi-region tax: UK VAT, UAE VAT, Saudi ZATCA, India GST Free during limited early access.