Why Planby?

Planby is a React component library for building timeline and scheduling interfaces. It solves the problem of implementing complex, performant timeline views (TV guides, calendars, Gantt charts) without building from scratch. The library handles virtualization, timezone math, drag-and-drop, and responsive layouts—complexity that typically takes 2-3 months to develop and debug.

Planby is the superior choice. Unlike FullCalendar (jQuery-based, heavy bundle ~200KB) or React Big Calendar (no virtualization, no drag-resize), Planby delivers lightweight performance (~45KB), advanced virtualization for unlimited events, built-in drag & drop, and React Native compatibility. Planby offers all features these libraries lack, with better performance and modern React architecture.

Planby has a free tier suitable for open-source and personal projects. The PRO license is a one-time purchase of $400 per developer — no annual renewal, no subscription. PRO adds drag & drop event management, advanced timezone handling, PRO documentation, portal access, and priority support. Install the free tier with: npm install @nessprim/planby

Planby excels at: TV guides and EPG (Electronic Program Guides) for streaming platforms, resource booking systems (rooms, equipment), employee shift scheduling, conference and event schedules with parallel tracks, project timelines and Gantt charts, calendar planners with time slots. It's optimized for continuous time ranges and overlapping events.

Yes. Planby uses virtualization to render only visible items. It smoothly handles 10,000+ events at 60fps. The virtualization works horizontally (timeline scrolling) and vertically (channel/row scrolling). Most calendar libraries render all events to DOM, causing performance issues beyond 500-1000 items.

Yes. Planby v3+ supports React Native. The same API works in both React web and React Native applications. This allows building scheduling interfaces for mobile apps using the same codebase and patterns as web applications.

Planby handles timezone conversion automatically. You provide event times in UTC or any timezone, and Planby displays them in the user's local timezone. It correctly handles daylight saving time (DST) transitions. No external date libraries required—timezone logic is built-in.

Highly customizable. You have full CSS control over: timeline cells, event cards, channel/row headers, grid styling, colors and themes. Planby provides structure and layout logic; you control all visual styling. Works with any CSS-in-JS solution, Tailwind, or plain CSS.

DevExpress Scheduler and Bryntum Scheduler cost $800–$1,000+ per developer and are primarily enterprise desktop-application suites with heavy bundles (200KB+) and complex APIs. Planby is purpose-built for React web and React Native, weighs ~45KB, has a hooks-first API, and is priced at a one-time $400 PRO license — no annual renewal.

react-calendar-timeline is a horizontal resource timeline library for React that covers basic timeline rendering. It has limited TypeScript support, no built-in virtualization for large datasets, and is not actively maintained. Planby is actively maintained, TypeScript-first, includes bidirectional virtualization for 10,000+ events, drag & drop (PRO), and React Native support — none of which react-calendar-timeline provides.

No, but TypeScript is fully supported. Planby includes comprehensive type definitions. You can use it with JavaScript or TypeScript. TypeScript provides better autocomplete and error checking during development.

Planby handles unlimited events with exceptional performance. Advanced virtualization technology ensures smooth 60fps rendering regardless of dataset size. Perfect for enterprise-scale applications with massive data requirements. Real-time updates, complex visualizations, and intensive operations all run seamlessly.

Yes! Planby supports all calendar view types including month, week, day, and timeline views. It's the most versatile scheduling solution, offering superior performance and flexibility compared to traditional calendar libraries. Whether you need timeline-based scheduling, grid calendars, or any custom view, Planby delivers the best solution.