App Overview

Harmony Voice icon

Harmony Voice

Harry Gohs · Music

Transform your voice into a choir with up to four voices !

$4.99 · In-app purchases

PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
2.3
24 ratings · Below Average

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 included13 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 Harmony Voice: 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

Offer diverse lesson types and interactive exercises to enhance user experience.

Assumption to check: Limited lesson variety and engagement

Validate with people who use this workflow before building.

Hypothesis 2

Implement high-quality audio streaming for better practice sessions.

Assumption to check: Poor audio quality during playback

Validate with people who use this workflow before building.

Hypothesis 3

Introduce visual progress tracking to motivate users.

Assumption to check: Difficulties in tracking progress

Validate with people who use this workflow before building.

Hypothesis 4

Provide quick in-app support and FAQs to assist users better.

Assumption to check: Unresponsive customer support

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

Transform your voice into a choir with up to four voices ! Harmony Voice is a pitch shifter and harmonizer with professional features including automatic tuning correction. A realtime visual intonation-display gives you feedback of the tunes you sing. You can sing and Harmony voice will add up to four voices according to the chords you play with the piano keyboard. Instead of playing the chords yourself you can let Harmony Voice play the chords automatically to enrich the sound of your voice in a musically pleasant way. The voice character can be adjusted in a way that you can turn a female voice into a male voice and the other way round. Features: • Four part realtime Harmonizer / Pitch corrector • Different Harmonizer modes: - Manual harmonization by playing chords with up to four notes while singing - Automatic harmonization ( Kraehenbuehl ) - Play base note and Harmony Voice adds appropriate chords - Directly play the tunes for up to four voices with the keyboard. • Select key note and scale for harmonization and pitch correction. • Harmonies can be in just ( Barbershop ) or tempered tuning. • Mix your original voice with the harmonized parts. • Change the voice character. • Play background track from your iTunes library. • Hi-end reverb effect for room simulation. • Chorus and Delay effect. • Audiobus 2 support (Input/Filter/Output) (requires iOS 7 or newer) • Use a CoreMIDI compatible Interface to control Harmony Voice with a MIDI Keyboard. • Audio recorder with Metronome. • Upload to SoundCloud and File Export. • Audio pasteboard for exporting to other Apps Headphones are required to avoid feedback. Headsets with mic work great, for best quality we recommend IK Multimedia's iRig Mic.

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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
Advanced

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.