Ultimate PO Box Blocker +

The reviews are overwhelmingly positive, with every reviewer giving the app 5 stars. Merchants consistently praise how easy it is to set up, how quickly it works, and how well it handles blocking PO box shipments. Several reviews mention that the app is thorough, fully configurable, and works exactly as expected, making it a practical solution to a common Shopify shipping problem. Customer support is a major strength as well, with multiple reviewers highlighting fast, responsive, and helpful service, including custom fixes and feature requests being handled quickly. The main negative point is not about the app’s core performance, but rather a missing feature in one review: the lack of a collections-based blocking option at the time. However, this concern was resolved quickly when the developer added the feature within a couple of weeks, which turned the issue into a positive example of excellent support and responsiveness. Overall, the feedback suggests a reliable, easy-to-use app backed by strong customer service and a team willing to improve the product based on merchant needs.