Obra is job costing software that tracks project finances through receipt capture and real-time cost monitoring. It organizes expenses and income by project, category, vendor, and currency. Receipts can be submitted via WhatsApp, email, photo upload, or AI assistants like Claude and ChatGPT, with OCR extracting transaction details for review before posting to a centralized ledger. The platform supports multi-currency management without automatic conversion and logs change orders with dates, descriptions, amounts, and attachments, preserving original contract values. Budget monitoring includes alerts at thresholds and weekly email summaries of cash collected, costs, and budget status. Financial tools offer cash flow analysis, category spending breakdowns, and portfolio-level averages. Role-based access lets field crews capture expenses while office staff approve transactions. Obra installs as a progressive web app, and public project pages share updates without revealing financial data.