Your big "Download" button has some UI issues.
* When I click it, a popup happens far away from the button.
* The popup prompts for my email address, but when I type nothing happens.
* When I click in the popup field to type, letters appear after the demo email address "email@address.com" rather than replacing the demo.
* The letters are in light gray (same as the demo email) and hard to read in sunlight.
* The popup field continues to show a tooltip "email@address.com" even though I've typed in my email address.
Pricing seems off to me because of "Only $0.99". I want to know about value, not cheapness. I would gladly pay much more for a task manager that works well for me.
Differentiate your app from Clear and Task. (both great apps)