The user can try out the fully-featured program until the trial period is up, and then most trialware reverts to either a reduced-functionality (known as freemium, nagware, or crippleware) or non-functional mode, unless the user purchases the full version. Trialware has become normalized for software as a service (SaaS). WinRAR is a notable example of unlimited trialware, i.e. a program that retains its full functionality even after the trial period has ended.

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