Consumer

noun

1. One who, or that which, consumes.
2. Someone who trades money for goods or services as an individual.

   "This new system favours the consumer over the producer."

3. (by extension) The consumer base of a product, service or business.

   "Our consumers are upwardly mobile and middle-class."

4. An organism (heterotroph) that uses other organisms for food in order to gain energy.