For FullChinese Pro App of Gammakite inc. , you could always delete your account or data anytime. If you want to delete your account, along with all your data, you could delete your account from the IOS app, or from the fullchinese.com website, but keep in mind that once delete Your account, all your data including the texts , posts, saved cards, saved books, and the joined classes etc would be delete immediately, they couldn't be recovered. Before delete your account, have to unsubscribe first if you have been subscribed with a paid plan.