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 Minuk Kim:
Smart Calendar is the application that manages events(possible to synchronize with iPhone Calendar) and shows holidays(now supports US,UK holidays).Features:- various views . monthly, weekly, daily, list. . fully supports landscape view.- customizable monthly view . various event shape . possible to change font size of day, event title. . flexible month view size.- attributes added to iPhone event . color. . whether is completed or not.- calendarset . it is the combination of calendars. it makes possible to change calendars by one touch.- display holidays (now supports US,UK holidays)- lock mode- backup/restore- setting badge.From Jan 24 to Jan 31 it is ranked 1st in paid app on Korea appStore.Limitation of lite version:- after a week, it expires.- if expired, it is impossible to add new event.- if expired, it is impossible to change setting.- if expired, it is impossible to sync with iPhone Calendar.