Font Master funktioniert nicht

Font Master: Handwriting is a font maker keyboard app for iPhone to create your own font using handwriting and use it as a keyboard for iMessage, Instagram, Snapchat, Tiktok, Facebook and more, chat with your friends !  Chat with your friends using your own handwriting that makes you feel private and intimate. - Payment will be charged to iTunes Account at confirmation of purchases. - 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, and identify the cost of the renewal. -Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user’s Account Settings after purchase. -Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable.