Absolutly yes. Most of the features have trial period. Testing period depends on feature. Some features dont have any trial because this does not make any sense.
In order to start a trial period, please go to Features tab and click to Trial button. If you dont see a Trial button, then either you had already had a trial or you have running subscription.
Once you have paid, you cannot start new trial period, Trial period can only be started once and before you pay for this feature first time.