Preorder, Back In Stock ‑ STOQ

This app was extremely easy to install and get running. I really like that they have a free plan that remains free until your business reaches a certain level - I wouldn't have tried it otherwise. It is very nice not trying to keep track of restock requests ourselves - would definitely recommend giving this app a try. It also doesn't slow down our site at all. The developers also provide reports about how many alerts go out and that is useful information to have. I use another app of theirs (Filemonk) and the team was very helpful and quick with the one problem I had. This app is so easy I didn't need any help on installation or management.