End User

n. one who uses a program that was specially made to suit him and his needs, ultimate group or person for whome something (such as a product, computer, computer program, etc.) is intended or designed

Economics and commerce define an end-user as the person who uses a product. The end-user or consumer may differ from the customer, who might buy the product, but doesn't necessarily use it; for example, a zookeeper, the customer, might purchase elephant food for an end-user: the elephant.In contracts, the term 'end-user' becomes a legal construct referring to a non-reseller. This definition characterises the store the zookeeper bought food from as a non-end-user, but the zookeeper as an end-user. This legal construct most often appears in End User License Agreements, also known as EULAs.
See more at Wikipedia.org...

Noun
1. the ultimate user for which something is intended
(hypernym) user

The user of a particular product.

The ultimate user of a telecommunications service.