What (who) is nagware - definition

PROPRIETARY SOFTWARE WHOSE FULL USE IS LIMITED IN TIME

Demoware; Nagware; Postcardware; Trial version; Trialware; Cardware; ShareWare; Nag screen; Shareware Games; Emailware; Try before you buy; Shareware games; Software demo; Free-to-try; Free to try; Shaware; Try-before-you-buy; Freetotry software; Trial software

nagware

/nag'weir/ [Usenet] The variety of shareware that displays a large screen at the beginning or end reminding you to register, typically requiring some sort of keystroke to continue so that you can't use the software in batch mode. Compare crippleware. [Jargon File]

shareware

<software> /sheir'weir/ Software that, like freeware, can be usually obtained (downloaded) and redistributed for free, but most often is under copyright and does legally require a payment in the EULA, at least beyond the evaluation period or for commercial applications. This payment, as well as fulfilling the user's legal obligations, may buy additional support, documentation, or functionality. Generally, {source code} for shareware programs is not available. Shareware is sometimes also nagware and/or crippleware, which muddles the term and is frowned upon in the community. See also careware, charityware, guiltware, postcardware, and -ware; compare payware. [Jargon File] (2002-01-30)

postcardware

Shareware that borders on freeware, in that the author requests only that satisfied users send a postcard of their home town or something. (This practice, silly as it might seem, serves to remind users that they are otherwise getting something for nothing, and may also be psychologically related to real estate "sales" in which $1 changes hands just to keep the transaction from being a gift.) [Jargon File]

Wikipedia

Shareware

Shareware is a type of proprietary software that is initially shared by the owner for trial use at little or no cost. Often the software has limited functionality or incomplete documentation until the user sends payment to the software developer. Shareware is often offered as a download from a website or on a compact disc included with a magazine. Shareware differs from freeware, which is fully-featured software distributed at no cost to the user but without source code being made available; and free and open-source software, in which the source code is freely available for anyone to inspect and alter.

There are many types of shareware and, while they may not require an initial up-front payment, many are intended to generate revenue in one way or another. Some limit use to personal non-commercial purposes only, with purchase of a license required for use in a business enterprise. The software itself may be time-limited, or it may remind the user that payment would be appreciated.

https://en.wikipedia.org/wiki/Shareware