App Overview

Vocal Tune Studio icon

Vocal Tune Studio

Davy Wentzler · Music

With Vocal Tune Studio, pitch and time correction of vocal recordings is now finally possible on your iPhone or iPad! Use it as an Audio Unit effect inside your favourite DAW or in standalone mode.

$14.99 · In-app purchases

PRICE
$14.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
3.6
26 ratings · Top 50%

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 included18 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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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

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Rork plan preview for Vocal Tune Studio: 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

Add more advanced editing features and tools for vocal processing.

Assumption to check: Limited features compared to professional DAWs

Validate with people who use this workflow before building.

Hypothesis 2

Implement clearer navigation and onboarding tutorials.

Assumption to check: User interface can be confusing

Validate with people who use this workflow before building.

Hypothesis 3

Optimize audio processing for better performance.

Assumption to check: Performance issues with larger recordings

Validate with people who use this workflow before building.

Hypothesis 4

Create a more transparent pricing model and provide clear benefits for each tier.

Assumption to check: In-app purchase structure is unclear

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

With Vocal Tune Studio, pitch and time correction of vocal recordings is now finally possible on your iPhone or iPad! Use it as an Audio Unit effect inside your favourite DAW or in standalone mode. From popular effects to subtile correction: Retune notes to achieve the popular auto tune effect or apply a more subtile correction. Besides pitch correction, notes can be corrected for timing and volume level as well. Deep editing: Each individual note can be adjusted for retune time, retune amount, volume and the amount of formant correction. Artificial vibrato can also be added and adjusted to taste using the vibrato depth and rate controls and settings to adjust the time when the vibrato kicks in and the time in which it reaches the full vibrato depth to obtain a natural sounding vibrato. Key and scale detection: Vocal Tune Studio can detect the key and scale of a vocal recording automatically or a key and scale can be manually chosen. Two workflows: Choose between two workflows similar to popular desktop vocal tune software: start with either all notes quantised (corrected) or non-quantised. When choosing non-quantised, an additional Pitch Quantisation slider lets you move notes between their original sung pitch and the target pitch within the selected key and scale. Time correction as a bonus for all audio material: Aside from vocal pitch correction, Vocal Tune Studio also features a generic time correction/stretching mode which works on any type of audio material (not only vocals, but also guitars etc.). In this mode, any part of a recording that was played off-beat can be time corrected without affecting parts that were recorded in time. Export MIDI: Besides the host's ability to render the effect to an audio file, the identified notes can also be exported as standard MIDI file. Standalone mode: Besides being a AUv3 plug-in, you can also run the app standalone. Record audio directly, import an audio file or paste an audio file from the iOS clipboard. Auto or manually tune your vocals and correct them for timing errors or apply time correction for any audio material. When finished, export the result to a WAV file. Note: Vocal Tune Studio is also available within our DAW, Audio Evolution Mobile Studio and offers much higher integration there, not requiring to 'record' the audio first into Vocal Tune Studio. User manual: You can find the user manual in PDF and HTML formats here: https://www.audio-evolution.com/manual/vtsau/index.html Tutorial video: Vocal Tune Studio being used inside Audio Evolution Mobile Studio https://www.youtube.com/watch?v=st75zBB4lds PLEASE NOTE: due to a bug in Auria, Vocal Tune Studio stops working when mixing down or freezing tracks. A work-around is to create a new audio track and select the master bus as input to perform bouncing.

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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.