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349 Nir Eyal, Ryan Hoover: Hooked: How to Build Habit-Forming Products

Unveiling the psychology behind habit formation, this book provides a practical guide for creating products that captivate users and build lasting habits.



In "Hooked: How to Build Habit-Forming Products," Nir Eyal and Ryan Hoover explore the psychology behind creating addictive and habit-forming experiences. Drawing from behavioral science, neuroscience, and real-world examples, the authors outline a four-step framework called the "Hook Model" that enables product designers to build products that engage users and foster long-term behavior. With practical insights and actionable techniques, this book equips readers with the knowledge and strategies to create products that become integral parts of users' lives.


Title: Hooked: How to Build Habit-Forming Products

Authors: Nir Eyal, Ryan Hoover

Publishing Year: 2014

Publisher: Portfolio

Length in Hours: 4 hours and 40 minutes

5 main ideas

  1. The Hook Model: Understand the four stages—trigger, action, variable reward, and investment—to create a habit loop that keeps users coming back to your product.
  2. Behavioral Design: Apply psychology and behavioral science principles to design products that capture attention, increase engagement, and drive user behavior.
  3. Triggers: Explore external and internal triggers that prompt user action, and learn how to strategically incorporate triggers into your product design.
  4. Variable Rewards: Discover the power of variable rewards to create anticipation and keep users hooked by offering unpredictable and satisfying experiences.
  5. Investment: Encourage user investment in your product through personalization, social connections, and the accumulation of data or content, fostering a sense of ownership and loyalty.

5 funny quotes

  1. "Creating habit-forming products is like being a magician – it's all about the art of distraction and surprise."
  2. "Think of habit-forming products as the fairy godmothers of the digital world – they grant wishes and keep users under their spell."
  3. "If your product can make users say, 'Just one more time!' like they're playing a video game, you've hit the habit jackpot."
  4. "Habit-forming products are the master puppeteers, gently pulling the strings of user behavior and making it dance to their tune."
  5. "The secret sauce of habit-forming products is a sprinkle of delight, a dash of anticipation, and a pinch of irresistible allure."

5 thought-provoking quotes​

  1. "A habit is when not doing an action causes a bit of pain."
  2. "To build a habit-forming product, makers need to understand the psychology of why users engage in certain behaviors."
  3. "The best products don't just solve problems, they create new ones."
  4. "Products that form habits are designed to exploit the very instincts that make us human."
  5. "The ultimate goal of a habit-forming product is to become a part of the user's identity."

5 dilemmas

  1. The ethical dilemma of building habit-forming products: Balancing the responsibility of providing value to users with the potential harm of addiction or overuse.
  2. The privacy dilemma: Collecting and utilizing user data to personalize experiences and enhance habit formation, while respecting privacy concerns and maintaining user trust.
  3. The social impact dilemma: Assessing the influence of habit-forming products on social interactions, mental health, and overall well-being.
  4. The design dilemma: Finding the right balance between simplicity and complexity to create engaging experiences without overwhelming or confusing users.
  5. The long-term sustainability dilemma: Considering the implications of fostering habit-forming behaviors that may not align with users' long-term goals or well-being.


5 examples

  1. Facebook: The book explores how Facebook uses triggers, notifications, and social interactions to create habitual usage among its users.
  2. Instagram: The authors discuss how Instagram leverages variable rewards in the form of captivating visual content and likes to keep users coming back for more.
  3. Fitbit: Fitbit is cited as an example of a product that encourages user investment through personal data tracking and social sharing, fostering a sense of ownership and accountability.
  4. Starbucks: The book delves into how Starbucks uses environmental triggers, such as the smell of freshly brewed coffee, to prompt customer actions and create a habit of visiting their stores.
  5. Candy Crush: The addictive nature of games like Candy Crush is examined, highlighting how the game employs the hook model to keep players engaged and coming back for more.

Referenced books

  1. "Influence: The Psychology of Persuasion" by Robert Cialdini
  2. "Thinking, Fast and Slow" by Daniel Kahneman
  3. "The Power of Now: A Guide to Spiritual Enlightenment" by Eckhart Tolle
  4. "Nudge: Improving Decisions About Health, Wealth, and Happiness" by Richard H. Thaler and Cass R. Sunstein
  5. "Atomic Habits: An Easy & Proven Way to Build Good Habits & Break Bad Ones" by James Clear

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"Creating habit-forming products is like being a magician – it's all about the art of distraction and surprise."

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