When you have so many things going on at once, a to-do list app can help you streamline and level up your productivity. Here are nine of our favorites.

To-do lists can be an integral part of being more productive and getting things done on your terms. But it can be frustrating to carry around a notepad and pen, especially when you're on the go ...

Never forget a task or an assignment with these to-do list, note-taking and project organization apps.

Most to-do list apps have too many features—leading to even more overwhelm. Do! is one of the simplest tools for keeping your to-do list in check.

The best to-do list apps available for iPhone and Android include Any.do, TickTick, Todoist, and Microsoft To Do.

These free to-do list apps will boost your productivity with everything from location-based reminders to giving you the ability to collaborate with others.