Hook Model Framework

Framework for building habit-forming products. Habits are not created — they are built through successive cycles through the Hook.

Core Principle

The Hook Model = a four-phase loop that connects the user's problem to your solution frequently enough to form a habit, moving usage from deliberate to automatic.

Trigger → Action → Variable Reward → Investment
    ↑                                      │
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Scoring

Goal: 10/10. When reviewing or creating product engagement mechanics, rate them 0-10 based on adherence to the principles below. A 10/10 means full alignment with all guidelines; lower scores indicate gaps to address. Always provide the current score and specific improvements needed to reach 10/10.

The Four Phases