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 QI HUI FENG:
pMem Lite is an application witch can help you when remembering by prompting you. pMem Lite is the free version of pMem, the number of prompt contents is limited to 3.Touch the cell in the first view can enter the prompt view. Click 'edit' button to manage the content u want to remember. Click 'start' to start prompting and the content will hide. You can remember or recite and click the 'prompt' button to see if your memory is right, or prompt you when you forget something by show a character or a word or a sentence one by one. For convenience swipe right to prompt instead of click 'prompt' button.