Offline-first business management for small businesses
Enquiries, quotations, invoicing, recurring billing, stock, cash register, and reports for small businesses — built to run entirely on your own machine, with a 15-day free trial and no card required to start.
Why WatCoreLite? Read the full story →
Built different
Not your typical invoicing software
AI Fill — type nothing, just paste
Hand a supplier bill, customer order, price list, or bank statement to the AI you already use — ChatGPT, Claude, Gemini — paste its reply back in, and WatCoreLite matches it against your real catalog automatically. No line-by-line manual data entry, ever.
One-click WhatsApp & email
Send a finished invoice or quotation straight to a customer's WhatsApp or inbox with a single click — using your own WhatsApp Business API or email account. No downloading a PDF, no attaching it by hand, no switching apps.
Built for people, not accountants
A clean, modern interface with no ledgers, no jargon, and no training required. If you can fill out a form, you can run your whole business in WatCoreLite from the first day you open it.
Everything a small business runs on, in one app
Invoicing & payments
Create invoices, record payments by method, and see exactly what's still outstanding — always, not just at month-end.
Customers
One place for every customer's contact and business details, with their full enquiry, quotation, and invoice history attached.
Enquiries
Log every lead the moment it comes in and track it — New, Contacted, Quoted, Won, or Lost — so a follow-up never quietly falls through the cracks.
Recurring Billing
Gym memberships, tuition, mess, or any customer billed on a repeating cycle — see exactly who's due, and bill them in one click. See how it works.
Quotations
Send quotes, track acceptance, and convert an accepted quote straight into an invoice — no re-typing.
Products, services & stock
A shared catalog for everything you sell, with optional stock tracking for physical items.
Cash register & vouchers
Track daily cash in and out, and log expenses by category with payment vouchers.
Staff & salary slips
Record what you pay each staff member through payment vouchers, then generate a clean, professional salary slip in one click — no separate payroll software.
GSTR-1 export for India
Turn a month of invoices into a ready-to-upload GSTR-1 JSON file — B2B, B2C, and HSN summary, CGST/SGST/IGST worked out automatically. Off by default; only Indian GST businesses ever see it. See how it works.
AI Fill — skip manual data entry
Hand a customer order, a supplier bill, a price list, or a bank statement to the AI you already use, paste its reply back in, and WatCoreLite matches it against your real catalog and records — so you only ever review what's actually new.
Reports
Sales, collections, outstanding balances, payments by method, expenses, and your top products — for any date range.
Fast billing at the counter
Scan a product code and hit Enter to add the next line, print to a 58mm/80mm receipt printer, or send the invoice by WhatsApp or email — all in one click, built for a busy counter.
Offline-first
WatCoreLite runs as a real Windows desktop app. Your day-to-day work doesn't need an internet connection.
Your data stays yours
Everything is stored locally in your own database on your machine — not on someone else's server. Export a full backup any time.
Modular by design
Turn on only the modules your business needs. A service business can skip Stock; a retail shop can turn on Products & Stock.
Built for any country
GST or VAT, GSTIN or TRN, Rupees or Dirhams — tax names, currency, and even amount-in-words wording are all yours to set, not fixed to India.
Pricing
Start with a full 15-day free trial — just tell us a bit about your business to get the download, no card required. After that, WatCoreLite is a straightforward subscription.
Plus applicable tax, calculated at checkout. Already downloaded? Enter your license key from Settings to subscribe with it pre-filled.