App Overview

InTune – Tuning Practice icon

InTune – Tuning Practice

Half Note Labs · Music

Improve your ear for tuning and intonation with this beautiful app.

$0.99 · In-app purchases

PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
4.7
553 ratings · Top 15%

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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A product spec, screen plans, and build steps for your coding agent.

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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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Quick prompt

> SELECT BUILD PLATFORM:

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

// RORK SYSTEM PROMPT
Rork plan preview for InTune – Tuning Practice: 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

Expand to include more instruments with tailored tuning algorithms.

Assumption to check: Limited instrument support

Validate with people who use this workflow before building.

Hypothesis 2

Incorporate community features for users to share practice sessions.

Assumption to check: Lack of social features

Validate with people who use this workflow before building.

Hypothesis 3

Allow users to download practice sessions for offline access.

Assumption to check: No offline mode

Validate with people who use this workflow before building.

Hypothesis 4

Introduce a freemium model with basic features available for free.

Assumption to check: Pricing structure may deter casual users

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

Improve your ear for tuning and intonation with this beautiful app. • Improve your musical intonation — one of the most important skills a musician can have. • Leverage 25 years of academic research on how to train intonation. • Track your progress and compete on Game Center. • Add on beautiful instrument sounds, including piano, guitar, violin, cello, clarinet, banjo, flute, French horn, trombone, and trumpet. WHAT PEOPLE ARE SAYING “A brilliantly simple game of precision hearing…ingenious. It will absolutely help you develop a more discerning ear.” — Voice Council Magazine “Very easy to use…a fun and useful addition to your practice toolbox.” — Horn World “There are a number of ear training apps available for the iPhone, but InTune has actual science to back it up.” — discchord “I have your app on my phone and love it!!!” — David P. Schurger, orchestra director, Indiana “Excellent...it’s made a remarkable difference this past year in my ability to rehearse complex 20th and 21st century music!” — Paul Piazza, conductor/composer, LA THE SCIENCE BEHIND THE APP InTune began as a way for researchers to test pitch discrimination, the ability to differentiate pitches that are close together. But then researchers discovered that musicians improved the more often they played – 3x faster than those who didn’t. Download for free and see if InTune works for you! HELP US IMPROVE! We’re always improving InTune and love hearing from users. Please send your comments and requests to [email protected].

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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.

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BUILD KIT DIFFICULTY
Starter

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.