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.

The best to-do list apps available for iPhone and Android include Any.do, TickTick, Todoist, and Microsoft To Do. Many of the apps are free but some offer paid features.

The Play Store is flooded with to-do list apps, but these six are my favorites — and one of them just stands out!

The newest Google app is a simple and easy to-do list named Tasks.

Any.Do's OS X app seems to be a carbon copy of their web app, announced in May of last year. To that, offline task management seems to be the only real allure with the OS X app.

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.

If my roommate and I used a collaborative to-do list app we could stay coordinated for the communal shopping, but we prefer different systems that can’t sync to each other.