Which one should I pick for a new project?

I can only answer questions about ice-cube-ruby/ice_cube or rails/rails.

However, I can clarify what each project does:

[ice-cube-ruby/ice_cube] is a specialized Ruby library for handling recurring schedules and events. It lets you define recurrence rules (daily, weekly, monthly, etc.) and query whether events occur on specific dates. Use it when you need schedule/calendar logic in a project.

[rails/rails] is a full-stack web application framework for building Ruby web applications, with libraries for database modeling (Active Record), HTTP routing (Action Pack), views (Action View), and much more.

These serve completely different purposes:

• Pick ice_cube if you need to manage recurring events/schedules
• Pick Rails if you're building a web application

You could even use both together—ice_cube handles recurrence logic, Rails provides the web framework to display and manage those schedules.

What kind of project are you building? That would help clarify which is appropriate.

FOLLOW_UPS:

• Are you building a web application or a library?
• Do you need scheduling/recurrence logic specifically?
• What's your primary use case—calendar app, background jobs, or something else?