The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
From Findmypub.com Ltd:
Make your name at Marstons!Marstons pub and job search the fast and easy way to find your next business opportunity or career move.Search for pub job opportunities nationwide.Use the GPS function on your iPhone to browse the tenanted and leased pub opportunities with Marstons nearest to your location at any given time, wherever you are in the UK.Features include: Search for jobs or tenancies/leasesSave your favourite propertiesSearch by locationSearch by funding levelsView images and letting details in real timeUse GPS to calculate map routeConnect to Marstons via phone or email at the push of a button