The Download Now link directs you to the Windows Store, where you can continue the download process. You must have an active Microsoft account to download the application. This download may not be available in some countries.
From Pinnacle Designs:
1: CLOCK is the one clock app for all of your clock needs. 1: CLOCK tracks world times, is a stopwatch, a timer, a night stand alarm clock, a white noise generator and allows you to manage alarms, 1: CLOCK is six apps in one. It has the following features: See times for over 3700 cities around the world. Accurate stopwatch that won't stop ticking when you exit the app (without any battery loss). Accurate timer that will notify you of expiration in or out of the app. Integrated alarms. Turn the phone sideways to get a nightstand alarm clock. Listen to white noise while in alarm clock mode. White noise does not have gaps and will run under the lockscreen. See battery level while in alarm clock mode. Save stopwatch times to be viewed later. Share your best stopwatch times with friends. View 12 or 24 hour clock format.