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 David Leblond:
How long has it been since the last time you fed the baby? How long has that chicken been in the fridge? How long before you can go on vacation? Life is time sensitive, and LifeTimer helps with that. You can add as many different timers as you like and they can count up or down. One tap lets you edit the description or icon. Two taps reset the count up timers. It's that easy. Never again will you have to think "did I feed her at 3 or 4?" The full version of LifeTimer also allows you to create custom categories, to sort your timers based on time remaining, and allows for different display modes to view only the seconds, minutes, hours, days, weeks, months, or years for a timer. All for only $.99 (with no ads as well.)