Yotei – Highly modular & customizable SwiftUI calendar

I built a calendar package for iOS that focuses on modularity, customization, and performance.

GitHub: https://github.com/claustrofob/Yotei

Why I built it

I kept rewriting calendars across projects and couldn’t find something that was both flexible and performant. Most solutions were either pure SwiftUI with corresponding bugs and limitations, UIKit-heavy (fast but harder to integrate cleanly) or some abandoned packages.

Key ideas

  • Highly modular architecture — use only the pieces you need
  • Fully customizable UI and behavior
  • SwiftUI-first API
  • UIKit under the hood for smooth scrolling & performance
  • Native iOS feel

Example use cases

  • Scheduling apps
  • Habit trackers
  • Fitness / activity apps
  • Booking interfaces
  • Timeline-based UIs

Would love feedback! Contributions welcome 🙌




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