The SaaS Rails Kit is a software as a service \"starter kit\" that provides a pain-free way to add subscription management, recurring billing, and credit card management functionality to any Rails app, so developers can quickly build membership-based web services using Ruby on Rails. Features: -No local credit card storage. - Automated billing script runs nightly for anniversary billing. - Automated notification and retry of failed renewals. - Free accounts and one-month trials are supported.