Księga – finanse firmy

Ledger helps entrepreneurs better understand their company's finances—without chaos, guesswork, and switching between tools.
In one application, you can issue invoices, manage the KSeF (Polish Sales and Financial Statements), check revenues, costs, estimated taxes, and the amount that actually stays with the company.
Instead of just looking at a list of documents, you see a simple picture of the financial situation.
What can you do with Ledger?
• Issue sales invoices,
• Send documents to KSeF (Polish Sales and Financial Statements),
• Check the synchronization status with KSeF (Polish Sales and Financial Statements),
• Download customer data from the Central Statistical Office (GUS) using their Tax Identification Number (NIP),
• Verify customers in the VAT register,
• Monitor revenues and costs,
• Check estimated VAT and PIT (Polish Personal Income Tax),
• See how much money is actually left after costs and taxes,
• Analyze basic business statistics,
• Have the most important data always at your fingertips.
Less chaos. More control.
Ledger was created for entrepreneurs who want to understand their numbers faster and make decisions based on data, not guesswork. The app doesn't just show invoices. It provides context: revenue, costs, taxes, and the company's actual results.
Who is Księga for?
For entrepreneurs who want to:
• have company finances on their phone,
• issue invoices faster,
• better control KSeF,
• see taxes earlier, not after the fact,
• know how much money really stays in the company.
Księga combines the simplicity of an app with a real-world approach to accounting.
Install Księga and see how much money really stays in your company.