"Hooked: How to Build Habit-Forming Products" is a book written by Nir Eyal, a renowned expert in product development and user engagement. The book was first published in 2014 and has since become a bestseller in the tech and business industries. The book provides a comprehensive guide on how to create products that are habit-forming, making users come back repeatedly without needing external motivation.
Nir Eyal has appeared on hundreds of podcasts, delivered conference keynotes, and published articles that summarize and apply the Hook Model's principles. These provide much of the same practical guidance in a different format.
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What are you building? (e.g., SaaS, mobile game, marketplace) Who is your target audience ? hooked how to build habitforming products free pdf fix
The Hook Model is a four-phase loop that, when repeated frequently enough, forms a lasting habit in the user's mind. 1. Trigger: The Spark Plug Every habit starts with a trigger. There are two types:
Understanding where your product sits on this spectrum is critical before investing heavily in habit-forming design.
To keep users hooked, a product must satisfy their cravings while leaving them wanting more. Predictable rewards do not create habits; variability does. The book categorizes rewards into three types: "Hooked: How to Build Habit-Forming Products" is a
Users sign up but never complete the core habit (e.g., adding a first habit in a habit tracker). Fix: Reduce friction to near zero. Eyal’s “Fogg Behavior Model” (B=MAP) – Behavior happens when Motivation, Ability, and Prompt converge. Fix tactic: Remove one “ability” hurdle. Don’t ask for a credit card. Don’t require 10 inputs. Make the first action a single tap or swipe.
The book provides examples of successful habit-forming products, such as Facebook, Twitter, and Pinterest, and offers practical advice on how to apply the Hook Model to your own products.
The final phase is the , which is the secret sauce for long-term retention. Here, the user puts something into the product, such as time, data, effort, social capital, or money. This investment is not about immediate gratification; it is about loading the next trigger. When a user follows someone on a new platform, creates a playlist, or builds a profile, they are "storing value" in the service. This investment increases the likelihood that they will use the product again, as it makes the service more valuable to them and creates a commitment bias. Nir Eyal has appeared on hundreds of podcasts,
Behavior=Motivation×Ability×PromptBehavior equals Motivation cross Ability cross Prompt
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