Pocket Informant has been written about a number of times here and is probably my most used app. It's normally $14.99 for the iPad version and is now on sale during Macworld Expo for $6.99. It is also available at a discounted price of $4.99 for iPhone and iPod Touch too.
Selecting the five best task management apps for the iPhone and iPad presents quite a challenge. A simple to-do list may be the best fit for one user, but woefully inadequate for someone who wants to implement a more robust task management system like the Getting Things Done (GTD) methodology developed by David Allen. Rather than focus on one end of the spectrum to the detriment of the other, I chose the five best apps in order of increasing functionality. Whether you only want to keep a simple list of tasks or need an app that can keep track of every detail of your life, you will find the perfect app among the following.