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 Lotorev A.:
I had originally created this small app as an inDoor application to satisfy the needs of my staff manager to deliver and modify work schedules to his employees, something, he claimed, that changed randomly and often unexpectedly. I quickly realized that this might also be useful to other service industry emloyers and decided to share it.The purpose of Worksched is to deliver work schedules to employees and highlight changes as they arise. The schedule can be provided by any source as long as this source is accessible by server-side script.Any additional information including server-side scripting examples and protocol specifications are available on Worksched's support page.