If you purchase the Remove Ads Add-on, the ads will not be displayed and there will be no difference from the paid version of ibis Paint. In order to use more advanced functions, the following Prime Membership (Monthly plan / Yearly plan) contracts are required. [Prime Membership] A prime member can use the prime features. You can try it free for the one-month at the time of the first purchase. A prime member can use the following features and services - 20GB of cloud storage capacity - Prime Materials - Prime Canvas Papers - Prime Fonts - Tone Curve filter - Gradation Map filter - Levels Adjustment filter - Replace Color filter - Clouds filter - Reordering artworks in My Gallery - No advertisements displayed * After you become a prime member with the first one-month free trial, if you do not cancel your “Prime Membership” at least 24 hours before the last day of the free trial, your “Prime Membership” will be automatically renewed and you will be charged for the automatic renewal. * We will add premium features in future, please look out for them. *Questions and support Questions and bug reports in reviews will not be responded to, so please contact ibis Paint support. https://ssl.ibis.ne.jp/en/support/Entry?svid=25 *ibisPaint's terms of service https://ibispaint.com/agreement.jsp