App Overview

Hooktheory I icon

Hooktheory I

Hooktheory LLC · Music

Embark on a musical journey! Follow the Hooktheory Book Series in a smart, fun, skill-building journey

$14.99 · In-app purchases

PRICE
$14.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
4.1
11 ratings · Top 30%

Evidence scope: No current overall US chart position is available. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.

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What's included17 files

A product spec, phased build plan, differentiation notes, and screen references.

  • START_HERE
  • AGENTS
  • EVIDENCE
  • SPEC
  • BUILD_PLAN
  • DIFFERENTIATION
  • skills/
  • screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.

Feature spec

Goal: Send a clear invoice after finishing a job.

  • Add a client, line items, a due date, and payment instructions.
  • Preview the total before exporting a PDF.
  • Keep an editable draft if export fails.

Screen plan

Invoice editor: Client at the top, editable line items in the middle, total and preview action at the bottom.

States: Empty draft, validation errors beside each field, exporting, and a retry action that preserves the draft.

Differentiate and validate

Hypothesis: Contractors need faster repeat invoices more than more templates.

First experiment: Test duplicating a previous job with five contractors. Watch where they hesitate before expanding the feature set.

The full kit adds a phased build plan, evidence notes, tool prompts, and implementation guidance. It is a plan for your coding agent, not a finished app.

Usage: Mechanics are fair game; never reuse the original name, branding, assets, or verbatim copy.

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> SELECT BUILD PLATFORM:

Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

// RORK SYSTEM PROMPT
Rork plan preview for Hooktheory I: map the core Music workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
            

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Opportunities

AI-GENERATED OPPORTUNITY HYPOTHESES

These are generated suggestions, not verified review quotations. Check current App Store reviews and speak with users before treating a possible gap as a requirement.

Hypothesis 1

Provide more detailed breakdowns and interactive features.

Assumption to check: Limited song analysis depth compared to competitors

Validate with people who use this workflow before building.

Hypothesis 2

Integrate social sharing to enhance user engagement.

Assumption to check: Lack of social sharing features

Validate with people who use this workflow before building.

Hypothesis 3

Introduce a freemium model with tiered pricing.

Assumption to check: High price point for some users

Validate with people who use this workflow before building.

Hypothesis 4

Allow users to download lessons for offline use.

Assumption to check: Limited offline access to lessons

Validate with people who use this workflow before building.

App evidence

Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.

App Store description

Embark on a musical journey! Follow the Hooktheory Book Series in a smart, fun, skill-building journey. Learn how to craft melodies and chord progressions like professional musicians, and discover an intuitive and deep understanding of how music works. Validated by over 30,000 hobby and pro musicians like you, the Hooktheory Book Series is the best-selling how-to series for musicians around the world for a reason. Hooktheory I isn’t like other music theory books. Hooktheory teaches with an easy-to-understand music format that emphasizes chord and melody function. Rich audiovisual animations play along as you learn. We dissect popular songs and show you how the pros do it. Immediately practice concepts and tactics with our companion musical sketchpad, Hookpad. There is nothing else like it! Fun to read. Easy to understand. Full of practical knowledge. Learn from 41 interactive exercises and 88 audiovisual examples from artists like The Beatles, Journey, Taylor Swift, Beyoncé, Adele, Coldplay, Billy Joel, Lady Gaga, Elton John, Maroon 5, and more! In Hooktheory I, you’ll learn the following skills: • Composing music based on a scale. • Understanding the six basic chords that underlie all great chord progressions. • Writing chord progressions based on function (understanding which chords go together and which ones don’t) • Making melodies “chord aware” - learn why certain melodies sound good with a chord progression and why others don't • Controlling the natural tension and release in melodies over a chord progression Benefits: • Simple piano roll notation (sheet music knowledge not required) • Every concept + technique demonstrated through an actual song • 88 audiovisual examples from artists like The Beatles, Journey, and Taylor Swift • Reinforce learning at every step with 41 exercises • Designed to be used with Hookpad Music Making Software. Hookpad lets you practice every concept and tactic you learn in the books immediately To sum it up, Hooktheory I will teach you the essential basic techniques for crafting effective and compelling chord progressions and melodies.   Reading Hooktheory I doesn’t require any previous music knowledge or the ability to read sheet music. On average, it takes about five hours to read so it isn't a huge time commitment. Dedicate only a few hours to reading this book and gain a lifetime of skills that will give your music that professional edge.

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Screenshots

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Build scope

Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.

Define the first version

Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.

Set boundaries

Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.

Check the hard parts

Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.

SUGGESTED BUILD STACK
React Native
Expo
Axios
React Navigation
Expo-AV
React Native Reanimated
BUILD KIT DIFFICULTY
Intermediate

From the Build Kit assessment.

A reliable timeline needs an agreed scope and a technical check. Ask your agent to estimate the phases in BUILD_PLAN.md after that review.