I've been using Fantastical to manage all of my meetings and to-do's. I'm super picky when it comes to calendar apps. I believe Flexbits did a great job making it SUPER easy to add/edit event info. My favorite feature is the ease of creating new events. I wish there was an app as simple as Fantastical, for to-do's only. I currently use Clear for that! :-)
Loom