Only one free trial is available per account.

Payment will be charged to iTunes Account at confirmation of purchase.
Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period.

Account will be charged for renewal within 24-hours prior to the end of the current period at the rate of the subscription.
Subscription may be managed and auto-renewal may be turned off by going to the Setting on the device at least 24 hours prior to the expiration of the existing plan.
Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription.

If you are in a free trial and do not want to continue using our service after the trial period, please cancel your subscription before the end of the trial period.
Cancellations that occur after the trial period have ended will incur a charge at the monthly rate of the service you are testing.

Term of Service and Privacy Policy.