It's a stripped-down GTD client for the iPhone. (GTD, for "Getting Things Done," is a stupifyingly complicated system for organizing and prioritizing To-Do items.) What's it called? "Put Things Off." ...

It’s the heaviness of my GTD app that allows my simple list app to be light. I’ve tried a bunch of apps, so here’s my round-up of the best list apps for iPhone.

Apple’s App Store has more than 500 results with the fairly unique “GTD” identifier in their description; Android’s Play Store has at least 1000 “GTD” appearances.

With the latest book from Getting Things Done author David Allen hitting stores Tuesday, we look at three lower-cost apps that offer to boost your productivity the GTD wayu2014CheckOff, GTD 2 Min ...