Shareware vs. Nagware

Sharewarenoun

(software) A type of software that is distributed without payment but is limited in any combination of functionality, availability, or convenience.

Sharewarenoun

software that is available free of charge; may be distributed for evaluation with a fee requested for additional features or a manual etc.

Shareware

Shareware is a type of proprietary software which is initially shared by the owner for trial use at little or no cost with usually limited functionality or incomplete documentation but which can be upgraded upon payment. Shareware is often offered as a download from a website or on a compact disc included with a magazine.

Nagwarenoun

Software that displays a message requesting that the user register it.