The app is currently not published on the app store as doing so would mean an additional fee chargeable by Shopify - a % that would need to be applied to all freight charges.
To install our KerryESG Global Fulfillment app, go to our direct installation link at http://fulfillmentapp.eservicesgroup.com and follow the instructions. During the installation, you will be redirected to your store backend to complete the installation as normal.