If you are under 13 years old, you are not legally allowed to purchase app subscriptions on your own without the consent of your parent or legal guardian. This is due to laws in place to protect children's online privacy and restrict their ability to make financial transactions without adult supervision.
To purchase an app subscription if you are under 13 years old, you will need to have your parent or legal guardian make the purchase for you using their own account and payment method. You can ask your parent or legal guardian to sign in to the app store on their device, subscribe to FlipaClip Plus, and complete the payment process.