Everything I look up about this app says that is it available on Windows. Even some posts on here are windows users. But when i search for it on the store it doesn’t show up, and when i open the link to its store page from a google search the “get” button is grayed out. I don’t use apple products but i would love to use this app and I dont understand why some people get to use it on windows but it wont work for me.
Sorry but Penbook has not been available on Windows for some time (due to some changes to their app store), but people who got it before can still get it.