For business houses, recurring billing is a very common need these days. Zoho subscriptions make it easy to generate recurring invoices and receive payments automatically. In Zoho Subscriptions, one can add products (services can be defined as products as well), attach plans to products and define subscriptions on top of plans. Monthly or annual subscriptions with various other options can be created. Subscriptions are associated with contacts and cards are also associated with the contacts. Zoho Subscriptions provides integration API through which it can be integrated with Zoho CRM, Creator, and other applications.