Singapore E-Invoice System, Online Inventory Software. Simple Accounting Software, Encompasses all essential features and tools for managing and tracking. Convert your invoices into e-invoices with just a click, right inside the accounting system. Automate your invoicing with GST-compliant Exiga Software Books software. Easily convert purchase orders to bills. Track and pay bills on time, gaining a clear overview of accounts payable and cash flow. Advanced inventory tracking includes serial and batch tracking. Detailed inventory movements and balances for efficient ordering process. Manage finances, invoices, and expenses in various currencies. Simplify global transactions with multi-currency capabilities.