Chronum is a time tracking and invoice management application designed for freelancers, consultants, and small service-based businesses. It combines session-based time tracking with integrated billing tools, allowing users to log work hours and convert them directly into professional invoices without switching between separate applications.The platform is available as a native desktop application for macOS, Windows, and Linux, as well as a web-based version with real-time synchronization between devices. Chronum uses a native architecture rather than a browser-based wrapper, which provides faster performance and lower resource usage compared to Electron-based alternatives.Key features include: Multi-currency project billing with real-time exchange rate conversion, enabling users to track income across different currencies and view consolidated earnings in a single base currency. Integrated invoice generator with live PDF preview, customizable templates, issuer and recipient presets, tax configuration, and batch invoicing across multiple projects. Visual activity timeline that maps work sessions chronologically throughout the day, showing tracked time, breaks, and session details at a glance. Adaptive rate history that preserves original hourly rates on completed sessions when rates change mid-project, ensuring accurate historical billing records. Work report generation with configurable filters by project and date range, session-level detail breakdowns, and export to PDF and CSV formats. Chronum's workflow centers on a project-based structure where users create projects with individual hourly rates and currencies, track time through live timers or manual entry, and generate invoices or reports from accumulated session data. The application includes a command palette (Cmd+K / Ctrl+K) for keyboard-driven navigation between projects, tasks, and documents.The financial dashboard provides an overview of total earnings, pending invoices, tracked hours, and income trends over configurable time periods. Task management includes status tracking for timesheet, pending payment, and paid stages.Chronum is currently in open beta with free access to all features. The planned pricing model includes a monthly and annual subscription tier.