Comment: What’s the best calendar app for iPhone?

Have you ever wondered what the best calendar app for the iPhone was? Calendar apps for iPhone are a tough thing to offer advice about because different people use them in different ways. Some people are busier than others (meeting-wise), and others use their calendar as a to-do system (personally I question your sanity if you are this way). All of the primary calendar apps I tried are great but might not fit how you use a calendar app.