Shareware license

A Shareware license is a license for the use of software that typically permits the use of the software in question under specific conditions unless a "full" version of the software is purchased. Shareware that includes frequent reminders is also known by the derogatory term nagware.

Limitations
Some of the most commons limitations of functionality included restricted time (i.e. terminate the program after a certain amount of time has passed), restricted functionality (where parts of the program are intentionally disabled or crippled), and limited actions (where only a certain number of actions can be performed before the software terminates the current session).

Some shareware software operates on the honour system, where the user is trusted to pay for a full version despite the shareware version including complete functionality.