People have complained about very sporadic updates for the app but it seems like a nice app. As I’ve mentioned elsewhere, I use Copy’Em for Mac/iOS, and if you’re looking for a Mac-only alternative I really like PasteBot too.
Copy’Em’s Mac app has an editable and reorderable paste queue, does screenshots (screen, screen in 10 seconds, manually selectable part of screen, window with/without shadow), lets you search/sort by types of clippings (text, images, links, which app clipped from), lets you create multiple saved lists, and offers built-in text transformations (eg upper case, lower case, capitalize words, remove empty lines, format as paragraph, pastes text as a file[!], prepend or append custom characters, and more). The Mac app is $9.99, the iOS app is free, but if you want to unlock the iOS app and share clipboards there is an optional $6.99/yr subscription.