Facts vs TimeOS 2.0: Bill your hours in Notion.
Side-by-side comparison of features, pros & cons, pricing, and community votes (2026).
🏆 TimeOS 2.0: Bill your hours in Notion. leads with 109 upvotes

The antidote to fluffy specs.
Facts is a developer-focused tool designed to bring clarity and precision to project documentation and specifications. It consolidates all relevant project data—such as implemented code, verified commands, ongoing specifications, and rough drafts—into a single, verifiable source. By running a 'facts check,' users can easily track the status of their project elements, ensuring everyone stays aligned and informed. Particularly suited for developers, AI teams, and project managers, Facts emphasizes transparency and accountability, reducing the noise of vague specs and unverified assumptions. Its unique approach of integrating code-backed facts with real-time verification makes it stand out as a reliable project management and documentation aid in the fast-paced world of coding and AI development.
Pros
- Provides a clear, consolidated view of project facts and status
- Integrates code verification and command checks for accuracy
- Helps teams maintain transparency and reduce miscommunication
- Encourages structured documentation with drafts and specs
Cons
- Limited information on pricing and deployment options
- Might require some initial setup for integration with existing workflows
- Current user base seems small, indicating limited community support
Best for
- • Tracking implementation progress of project features
- • Verifying commands and code snippets in development environments
- • Managing project specifications and drafts effectively
- • Ensuring all team members have a single source of truth
Pricing: Likely employs a freemium model with basic features available for free and premium plans offering advanced verification and integration tools, though explicit pricing details are not publicly available.

Work your tasks. Bill your clients with confidence.
TimeOS 2.0 is a seamless productivity and invoicing solution built directly into Notion, designed for freelancers, consultants, and small teams who want to streamline their workflow and billing process. By integrating time tracking with a dedicated invoicing companion app, users can log work sessions effortlessly and generate professional invoices with just a few clicks. The recent 2.0 update enhances this experience by allowing users to load their tracked sessions, generate PDF invoices, and customize them before sending clients. Its tight integration within Notion makes it an attractive choice for those already immersed in the Notion ecosystem, offering a unified platform for task management, time tracking, and billing. What makes TimeOS 2.0 particularly unique is its ability to close the loop—from tracking hours to invoicing—eliminating the need for multiple tools and reducing administrative overhead, all within a familiar workspace.
Pros
- Deep integration with Notion for seamless workflow management
- Simple process to convert tracked hours into professional invoices
- Customizable invoice templates for branding and client needs
- One-click PDF generation and easy client sharing
- Ideal for freelancers and small teams seeking all-in-one productivity and billing
Cons
- Limited information on pricing structure; likely subscription-based
- May require some initial setup and familiarity with Notion
- Could lack advanced invoicing features found in dedicated billing software
Best for
- • Freelancers tracking billable hours for multiple clients
- • Consultants managing project-based work and invoicing
- • Small creative agencies handling client work within Notion
- • Solo entrepreneurs needing integrated task management and billing
Pricing: Likely follows a freemium model with basic features free and premium options available; exact pricing details are not specified but expected to be subscription-based, possibly starting around $10-$20 per month.