After passing the trial expiry date and time (expiry of trial period), the software will either stop working, or continue working with limited or restricted features, or displays a reminder message about expired trial demo license. The plan is sort of “try before you buy”, where if users satisfy with the software after trying it, they should buy the program by paying a license fee to the developer.
A lot of software and applications are released as a shareware, also known as demoware (demo) or trialware (trial version), where users can download the trial version shareware from the Internet or get the apps from distributed magazine cover-disks, and use it for a stipulated period of time (trial period), free or charge without any payment.