A notebook or software in which one keeps notations of items such as appointments, tasks, projects, and contacts.(noun)
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Use "planner" in a sentence
"• If the planner is a registered investment adviser, ask for the firm's ADV form filed with the Securities and Exchange Commission."
"He is an industrial specialist / scientist, what you call a planner or strategist - the sort of person who is often referred too in professional circles as "the diamond cutter," if you need to turn around a loss making factory or manufacturing enterprise - he is the man who makes it all happen."
"The comment of the "planner" is very, very revealing and we will post later on the technical implications."