Sounds like Milo... But compete on.
Pitch on Milo is more "share your inventory" rather than "manage your inventory with incredible easy." Subtle but important difference in the pitch's underlying meaning...
Based on Milo's integration list it sounds like there's lots of inventory software out there already. Not sure how much of it is "great". Suspect a lot of it needs to leverage RFID, handheld scanners, etc.
For anyone moving on this, think about hardware compatibility that's drop-dead-simple for storeroom, warehouse workers, and the guy who's unloading the truck to use. This is one part web app, 99 parts warehouse app from the retailer's point of view.
The other significant thing here is just how fractured the retail POS market is. There are literally dozens of single-point POS systems, and Milo integrates with 5 of the larger ones. Many of them are regional players who built their market up through hands-on customer service. They just aren't going to get unseated that easily.