Calvetica [$2.99] is a super fast calendar app. Entry takes mere seconds and adding alerts to an event is just a tap away.
Pro Highly optimized event entry
To add an event, just tap and hold. Two fields will appear, event name, and time. When filling in the time field, a number pad will automatically be displayed for faster entry.
Alerts are automatically added and set to go off at a standard custom amount of time before the event.