If you can lay your hands on any Apple iPhone — from the first generation iPhone 2G to the current iPhone 6S — you will immediately notice that the device has always come bundled with a Calendar app.
As a statement of our paperless lives and the forefront of technology, the fact that calendars still come bundled with our smartphones is proof enough of the key role they play in our lives. Consider further the fact that a digital calendar is merely a faithful replica of our offline paper planner. A calendar is the best tool to plan your day and your week with, and coupled with a reminders app, it is the only time management solution you will ever need. And they are simple enough to use, yet some use them ineffectively.