TennisCourt app comes with 1 day trail After this period you may purchase an auto-renewing subscription through an In-App Purchase.
(If you do not maintain a subscription you will not be able to acces the tools in the TennisCourtApp)

•Auto-renewable subscription
• 1 year ($6.99) durations\n\n
• Your subscription will be charged to your iTunes account at confirmation of purchase and
will automatically renew (at the duration selected) unless auto-renew is turned off at least 24
hours before the end of the current period.

• Current subscription may not be cancelled
during the active subscription period; however, you can manage your
subscription and/or turn off auto-renewal by
visiting your iTunes Account Settings after purchase.