Citrix XenApp is a Windows application delivery system that manages applications in the datacenter and delivers them as an on-demand service to users anywhere using any device. XenApp reduces the cost of application management by up to 50 percent, delivers any application instantly to users anywhere and improves application and data security. It is formally known as Citrix Presentation Server.
How to buy
Concurrent Uer Connection
Need to license the number of users who will be accessing it at any one time. This is commonly referred to as concurrency.
Citrix Subscription Advantage
Subscription Advantage provides a convenient way for customers to budget for their product version upgrades annually without having to anticipate variable costs throughout the year (no additional cost). Here's the link to all the benefits. One year is included in most products. After the first year, Subscription Advantage must be renewed in order to continue receiving software updates.
Easy Licensing
Buy only what you need with Citrix EASY Licensing. Recommended for small business customers and/or individual departmental deployments, EASY Licensing is an ideal entry point into Citrix licensing. EASY Licensing offers the same pricing and simple click-to-accept End User Licensing Agreement (EULA) as purchasing packaged product, but you receive the added benefit of electronic licensing. There is no contract paperwork to sign; license fulfillment is quick and easy, enabling more rapid deployment of your Citrix product purchases.

