Morgen is a well rounded calendar app that has great desktop and mobile apps. I prefer Morgen over many other calendar apps (Rise, Routine, Amie, etc).
I love Morgen. I've been using it for a few weeks now and it's been useful to turn tasks into events and plan my work day alongside my team calls. I'm missing a few features but they're probably in the paid version that I haven't tried yet such as adding multiple calendars.
I love Morgen and use it for scheduling our meet and greets with our clients' patients. I love the interface and how the events can be easily changed, merged, etc. It's a great calendar, scheduling, and tasking tool.