# Duration of the EthoVision XT license

An EthoVision XT license can be:

Perpetual license

This is the most common license. You purchase a copy of EthoVision XT on a one-time basis and can use the software forever.

Time-limited license

This license is generally valid for a period of six or twelve months.

▪A time-limited license can only be activated online. See Activate your EthoVision XT license

Trial license

This is a temporary, free-of-charge license that you can use to evaluate the newest version of the software. See EthoVision XT trial version

▪A trial license can only be activated online. See Activate your EthoVision XT license

See also

▪Types of EthoVision XT license

▪Activate your EthoVision XT license

▪Upgrade EthoVision XT

▪License agreement