XFlow Back in Stock Alerts

It's not 5 stars because there was a hiccup after couple of months using the app. I installed the app because of the Free plan, spent time getting it running, and then the free tier was cut and my back-in-stock emails stopped until I upgrade to paid plan. It was dissapointing to say at least, and quite stressful. But, they stepped up, admitted it was a wrong direction to go as a company, and made custom free plan for me with bare bones (as I didn't need all the options they were upgrading to), which suits me fine. Other than that hiccup, customer service is great and app works great. Would recommend.