There are a few qualities to look for in a to-do app. The new app, Microsoft To Do, frankly took too long to come to market and arrived half baked, which is why it isn't included here. Microsoft's stated ambition was to build a replacement app for Wunderlist from the ground up, cloning all its best features in the process.

One of the most popular to-do list apps, Wunderlist, was acquired by Microsoft in 2015 and taken out of commission five years later. We also looked for apps that fit different user profiles, such as people who follow the Getting Things Done (GTD) method of organization ( OmniFocus 3 and Toodledo are good choices). We also consider collaboration, meaning the ability to share a to-do list with other people, though we see it as a bonus feature and not a requirement to be included. One of the major points of consideration when testing and scoring is how well these apps help you organize and stay on top of your tasks. After evaluating around 25 possible contenders, we tested and evaluated them and selected the highest-scoring apps to list here. That's why for this list, we only include apps that you can access on both desktop and mobile devices. For example, there are plenty of excellent apps for Android or iPhone, but they do you no good when you're working on a laptop and need to jot down a thought quickly without picking up your phone and losing your place. To-do list apps are a dime a dozen, and few of them stand out as being much better than others.

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Calendar and to do list app