TickTick

TickTick is a planner app that you can use to easily organize your daily tasks. Thanks to this app’s elegant and easy-to-use interface, you can track all your daily tasks, such as appointments, meetings, jobs, and more.

It's easy to add items to your calendar with TickTick, as well as add dates or reminders to your tasks so you never forget an important item again. Once you've completed a task, just check it off your list.

On top of that, you can personalize the appearance of TickTick from its options menu. It has a blue theme by default, but there are many other colors to choose from as well as the option of adding a lock pattern.

With an easy-to-use, elegant interface and loads of customization options, TickTick is a great Mac app. Check it out and keep track of all your pending tasks.