Kaal-Rails is a Ruby gem that provides seamless integration of Kaal with Ruby on Rails, allowing you to easily schedule and manage cron jobs in a distributed environment using ActiveRecord models. With Kaal-Rails, you can define your cron jobs as ActiveRecord models, and Kaal will handle the scheduling and execution of those jobs across multiple instances of your Rails application. This makes it easy to build scalable and reliable background job processing systems in your Rails applications.