Iconical is a Windows Phone calendar app that allows you to create multiple appointment groups filtered from your Windows Phone calendars and pin them to your Start Screen for quick and easy reference.
You create appointment filter groups based on subject keywords. The Live Tile focus lets you pin that group to your Start Screen, view up to three appointments (ten with the Plus version) in that filter group, and help you keep up with all your appointments. You can create filtered groups for school, work, medical or any other appointment keyword that you need to monitor a little closer.
Iconical is an interesting Windows Phone calendar app that definitely has potential.