SmartKal is a mobile networking app that enables people to share their plans with friends quickly, with optional public profiles. And since all the plans are organized by time, it is easy to browse and search through friends' plans. Comment on friends' plans, invite other friends, search for friends'plans on a given day. The model is different from Plancast.
SmartKal also enables users to sort events by time or popularity
Monetization: targeted ads, deals, in-app purchase of tickets