methodatlas
Growth

Hooked Model

Models trigger, action, variable reward, and investment loops to understand and design repeat usage responsibly.

Core question
Which hooked loop combines trigger, action, variable reward, and investment so user habits form that genuinely help users without creating manipulation?
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Purpose

The Hooked Model helps clarify engagement loops, user behavior, and experiments. It makes repeat behavior measurable and captures the result as a hooked loop, trigger map, and reward design.

How it works

The team identifies external and internal triggers, defines the lowest-friction action, designs variable rewards, adds investment points, strengthens the loop iteratively, and checks ethical and manipulation risks.

Visual orientation

Method sketch for a quick mental model.

Hooked Model · Habit LoopDesign and check Trigger, Action, variable Reward, and Investment as a recurring usage loop
Trigger -> Action -> Reward -> InvestmentNutzungsgewohnheiten entstehen aus Trigger, Action, variabler Belohnung und Investment.Trigger bis Habit LoopNutzungsgewohnheiten entstehen aus Trigger, Action, variabler Belohnung und Investment.Motivation + Fähigkeitunvorhersagbarer Wertgespeicherter Fortschrittneuer TriggerTriggerextern oder internActionkleinste HandlungRewardvariable BelohnungInvestmentNutzer legt Wert anHabit Loopder nächste Trigger wird wahrscheinlicher

Flow

  1. 1Identify external and internal triggers
  2. 2Define the lowest-friction action
  3. 3Design variable rewards
  4. 4Build in investment points
  5. 5Strengthen the loop iteratively
  6. 6Check ethics and manipulation risks

The runsheet guides execution with 6 phases, timeboxes, 6 pitfalls, and clear stop criteria.

Open runsheet

Ideal for

  • Consumer apps and platforms
  • Engagement and retention topics
  • Habit-driven products
  • Growth teams

Not good for

  • Safety-critical or regulated domains
  • Products without a repeat engagement need
  • Manipulative applications without an ethics review

Deep dive

In detail

The Hooked Model was developed by Nir Eyal. It describes a four-step loop: a trigger, external or internal, leads to an action made as easy as possible. A variable reward reinforces the action through uncertainty and attention. An investment by the user, such as data, content, relationships, or configuration, increases the likelihood of returning on the next trigger. Over time the loop can build habit.

Facilitation

Model the loop for one concrete user situation and test every step against real user value. Add a manipulation check so engagement does not become a trap.

Output artifacts
Hooked loopTrigger mapReward designEthics check
Tags
growthengagementhabitbehaviorretention

Sources

Nir Eyal Official Site: Articles, Videos, and Newsletternirandfar.com
Artifact templates
Hooked Model Working TemplateCompact working template for Hooked Model with context, input, output artifacts, and next step.
canvas

hooked-model-working-template.md

Compact working template for Hooked Model with context, input, output artifacts, and next step.

Hooked Model Canvas

Context

What is this method used for?

Core question

Which question should be answered at the end?

Input

Which data, observations, or materials are available?

Working area

  • Area 1:
  • Area 2:
  • Area 3:
  • Relationships / patterns:

Output artifacts

  • Hooked loop:
  • Trigger map:
  • Reward design:
  • Ethics check:

Open questions

  • ...

Next step

Owner, date, success signal.

When to choose differently

Short decision aid for existing alternatives.

Pirate Metrics AARRR

Statt Hooked Model, wenn ihr die ganze Aktivierungskette von Akquisition bis Referral messen wollt.

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