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 Oliver Mahn:
Originally i wrote this App for personal use but I thought it could be useful for other people as well.You can manage unlimited lists (create/edit/delete) and for each list you can manage unlimited entries. Each ToDo contains subject, duedate, status (open/closed) , priority (high, medium, low) and a notice. Entries will be grouped by status or priority.At duedate you will receive a notification like you get with the apple calendar app.I would appreciate sending me improvements or new features for further versions.I thought about customizable priorities, export as csv-file or syncing with other devices.For contacting me please visit the webpage.There is a free Version with limited lists and entries counts: ToDoListsLite