Hello PicCollage Community!
After free trial ends, your account will automatically convert to an annual VIP subscription through Apple. If you would like to continue with a VIP subscription on a monthly basis, please follow the instructions here on how to switch: iOS: Managing and Changing VIP Subscriptions
If you have any additional questions regarding VIP subscriptions or free trials, please check out our VIP Help Center or contact our team: Contact the PicCollage Team!