Pageseal is a Shopify app, with plugins for WooCommerce and Medusa, that turns every eBook sale into a personal copy. A note page shows the buyer's name and order number, and every copy also carries an invisible code, so a shared file leads back to its order. It works for EPUB (reflowable and fixed layout), PDF and audiobooks (MP3, M4B, M4A). Before the first sale, Pageseal checks each EPUB against the EPUB standard and shows real pages from Apple Books, Android readers and Kindle, with fixes in plain words. Buyers need no password and no special app. The Free plan costs 0 dollars a month; paid plans start at 15 dollars a month with 40 copies included and 14 days free.