Do you have a manager that's been nagging you about an end date or a project estimate? Estimate can solve your problem.
gem install estimate # install
estimate <project_name> -u <username> -p <password> --ssl
Usage: estimate <project_name> [options]
-u, --user STRING Pivotal tracker username
-p, --pass STRING Pivotal tracker password
-s, --ssl Use secure connection
-d, --developers INT Number of developers (default: 2)
-x, --day_points INT Points allocated to a day (default: 1)