Another key criterion was the ability to add tasks quickly and easily. I ran dozens of apps through the 'sticky note test.' Many didn't make the list due to clunky or complex interfaces. So any app that's worth your attention needs to pass a basic test first: is it as intuitive as a sticky note? If the app is too complicated, you might find yourself drifting back to writing your tasks on Post-it notes or in. The best to-do list is the one you'll actually use. For more details on our process, read the full rundown of how we select apps to feature on the Zapier blog. We're never paid for placement in our articles from any app or for links to any site-we value the trust readers put in us to offer authentic evaluations of the categories and apps we review. We spend dozens of hours researching and testing apps, using each app as it's intended to be used and evaluating it against the criteria we set for the category. All of our best apps roundups are written by humans who've spent much of their careers using, testing, and writing about software.