Planner (noun)

1. A person who makes plans, especially for a project or organization.
2. A book or electronic device used for making and keeping track of appointments and tasks.

Origin:

From plan + -er. the word was first used in the early 20th century.

Examples:

1. She is a planner and helps the company to organize and plan their events.
2. The city planner was responsible for the development of the city.
3. She is a wedding planner and helps couples to plan their big day.
4. He is a financial planner and helps people to plan for their retirement.
5. She keeps track of her appointments and tasks using a planner.