Pre‑order Manager Pro

Very slow on retrieving new items from the inventory.
Quite labour intensive, why it can't be added to the "Add product page" is beyond me.
Very confusing as well, could be a lot simpler, over complicated for no real reason.
Saying all that, I've tried a few, and this is the best of a bad bunch.

Brilliant app, it's only dropped a star because I can't bulk de-activate pre-orders, and a whole star feels harsh, I'd give 4.5 stars if I could. This is the third pre-order app I've tried, and it's by far the best. This app has two main advantages over others I've tried: the button loads immediately, and the app isn't affecting page load speeds. One of the other apps I tried loaded a script that was a bit slow, so it was possible for customers not to be shown the "Pre-Order" version of the button. Another app I tried added full seconds to page load speeds. This app has none of these problems. On top of that, this app is the easiest to use, it's really intuitive. I emailed the developer a question about how it worked and got an excellent answer right away, too.