Hooked by Nir Eyal

Build Habit-Forming Products

Key Lessons from Hooked by Nir Eyal

The most successful products in the world make us form habits around them

9 Key Takeaways from the Book

The Power of Habit-Forming Products

Successful products like smartphones and social media platforms become part of users’ daily routines. These products create habits that are hard to break, making customers loyal and less sensitive to price changes.

The Hook Model

Eyal introduces the 4-step Hook Model for building habit-forming products: Trigger, Action, Variable Reward, and Investment. This model helps designers create products that people keep coming back to.

Triggers Drive User Action

A habit-forming product starts with a trigger, either external (like a notification) or internal (like boredom or fear). These triggers prompt users to take action and engage with the product.

Make the Action Easy

The easier it is to use your product; the more likely people will engage with it. Reducing friction at the point of action is crucial to forming habits, whether it’s signing up or making a purchase.

Variable Rewards Create Addiction

Variable rewards are key to habit formation. By offering unpredictable outcomes, such as likes on social media or surprise offers, users become hooked, continually seeking the next reward.

User Investment Increases Retention

The final step in the Hook Model is investment. When users invest time, money, or data into a product, they are more likely to return. This builds long-term loyalty.

Mix Different Types of Rewards

To keep users engaged, offer a mix of rewards. These can be rewards of the tribe (social validation), rewards of the hunt (searching for information or products), or rewards of the self (personal achievements).

Ask If Your Product Should Form Habits

Not all products need to form habits. Ask yourself two key questions: Does this product improve the user’s life? Would I use it myself? If the answer is yes, then habit formation may be the right approach.

Ethical Considerations

Building habit-forming products comes with moral responsibility. Eyal emphasizes that products should only create habits if they genuinely improve the user’s life, like fitness apps or productivity tools—not harmful addictions.

Product Success = Triggers + Easy Actions + Variable Rewards + User Investment

If you want users to keep coming back, you need to trigger engagement, make it simple, reward unpredictably, and encourage investment. That’s how habit-forming products thrive.

To build a habit-forming product, start by asking: Does this product improve users' lives, and would I use it myself?

Summary Note

Hooked by Nir Eyal explains how to design habit-forming products using the 4-step Hook Model: Trigger, Action, Variable Reward, and Investment. By understanding user behavior and offering unpredictable rewards, companies can create products that people can’t resist using. 

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Initiate

Leadership
Begin your leadership journey by learning the fundamentals of effective leadership. Understand core principles and start applying them in small settings.
Well-Being & Harmony
Start prioritizing your well-being by adopting basic healthy habits. Focus on simple lifestyle changes to improve mental, physical, and emotional health
Self-Discovery & Self-Esteem
Begin your journey of self-discovery by exploring your strengths, values, and passions. Engage in self-reflection to understand your true self.
Money Mastery
Start mastering your finances by learning the basics of budgeting and saving. Set financial goals and create a plan to achieve them.
Entrepreneurial Spirit
Ignite your entrepreneurial passion by brainstorming ideas and exploring opportunities. Begin developing your business concept.
Family Relationships
Strengthen family bonds by prioritizing quality time and open communication. Establish a foundation of trust and support.
Empathy
Begin fostering empathy by actively listening and understanding others’ perspectives. Practice compassionate communication in daily interactions.
Professional Development
Start your professional development journey by setting clear career goals and acquiring foundational skills. Seek opportunities for learning and growth.
Spiritual Wisdom
Begin your spiritual journey by exploring your beliefs and practicing mindfulness. Develop a deeper understanding of your inner self.