Growth Framework

Hooked Model

Analyzes recurring use through Trigger, Action, Variable Reward, and Investment under ethical boundaries.

The Hooked Model describes a usage loop. Internal and external triggers lead to a simple action, variable reward, and investment that raises future value. Ethical review protects autonomy and wellbeing.

Core question

Which responsible usage loop repeatedly helps users solve a real problem?

Plan Hooked Model Method guide

Start comparison

Give feedbackIs this method useful to you?

Participants: 2-8
Time: Multiple workshops over several weeks

Hooked Model uses Trigger → action → variable reward → investment with ethics and outcome review. Assessments remain justified and context-bound.

Paper illustration of Hooked Model with its method-specific working model.

Trigger
Trigger
Evidence internal need and a responsible external trigger.
Action
Action
Identify the simplest value-creating action and friction.
Reward
Reward
Link reward to problem resolution and justify variability.
Investment/ethics
Investment/ethics
Test user investment, future value, and autonomy guardrails.

Update after new evidence or a material context change and retain the previous version.

A good fit when

For products where recurring use creates real user value; unsuitable for manipulative engagement goals.

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

Outputs

ethical hook map
ethical hook map with traceable sources, assumptions, and domain decisions.
Decision and review trail
Owners, dates, and next review for ethical hook map.

ethical hook map

Fictional worked example

Trigger → action → variable reward → investment with ethics and outcome review as a precise working structure with a fictional example.

Trigger

Trigger information to record

Opt-in Wochenübersicht bei Sorge um Zusagen.

Action

Action information to record

Offene Maßnahme bestätigen.

Variable Reward

Which useful variable information or outcome does the user receive?

A different real progress signal each week: resolved blocker, early completion, or visibly reduced risk.

Investment/guardrail

Investment/guardrail information to record

Fälligkeit aktualisieren; mute möglich.

The example demonstrates the domain logic of Hooked Model; worksheets remain blank.

Nir Eyal: The Hook Model

First step

Start with the core question: Which responsible usage loop repeatedly helps users solve a real problem?

Open the method guide

Good to do first

Paper illustration of a JTBD interview notebook with a decision timeline, forces of change and a concise job hypothesis.

Product Discovery

Jobs to Be Done

Supplies the recurring user job around which the hook loop is built.

Where to go next?

Growth

Pirate Metrics AARRR

Places the hook's trigger, action and reward along the AARRR funnel.

Growth

Growth Experiment

Tests a change to the hook loop's trigger or reward.

Deep dive

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.

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.

The method guide walks execution through 4 phases, timing, 4 pitfalls, and clear stop criteria.

Open method guide

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Sources and topics

Topics

Growth Behavior Retention

Sources

Nir Eyal: The Hook Modelnirandfar.comnirandfar.com by Nir Eyal; describes the four-step Hooked Model of trigger, action, variable reward and investment.

In playbooks

Find and Sharpen Growth LeversMove from the core purpose of growth through a self-reinforcing loop to a concretely designed user hook.

Artifact templates

Hooked Model: WorksheetPlan Hooked Model around its domain steps and the concrete decision question.

markdown

hooked-model-working-template.md

Plan Hooked Model around its domain steps and the concrete decision question.

Hooked Model: Worksheet

Question

To be confirmed

Desired outcome

To be confirmed

Scope

Establish and review the practice Time: 60–90 minutes

Complete this worksheet on paper or in your own document during the work.

Preparation for this scope

Method setup

Materials: Recurring user job, behavioural and research data, ethics and wellbeing guardrails, shared workspace, source links, and decision log.
Roles: Product · Research · Design · Data · Ethics/Legal when risky
Advance information: Collect Recurring user job, behavioural and research data, ethics and wellbeing guardrails in advance and mark open assumptions.
Overall time needed: 60–90 minutes
Setup: Prepare Trigger → action → variable reward → investment with ethics and outcome review visibly and calibrate assessment terms before starting.

Prepare for the work steps

Trigger: Trigger

Recurring user job
behavioural and research data
ethics and wellbeing guardrails

Action: Action

trigger pair
behavioural and research data
ethics and wellbeing guardrails

Reward: Reward

core action
behavioural and research data
ethics and wellbeing guardrails

Investment/ethics: Investment/ethics

reward design
behavioural and research data
ethics and wellbeing guardrails