App Overview

Christella VoiceUp Complete icon

Christella VoiceUp Complete

Speechtools Ltd · Health & Fitness

Christella Antoni is a Consultant Speech & Language Therapist with over 20 years of experience and is the UK's leading expert in transgender voice modification

$44.99 · In-app purchases

PRICE
$44.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
5.0
3 ratings · Top 5%

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 included16 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 Christella VoiceUp Complete: map the core Health & Fitness 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

Include a broader range of exercises to cater to different vocal skills.

Assumption to check: Limited variety of exercises

Validate with people who use this workflow before building.

Hypothesis 2

Offer more affordable subscription tiers or bundled features.

Assumption to check: High price point for access

Validate with people who use this workflow before building.

Hypothesis 3

Implement user forums or peer support groups.

Assumption to check: No community features

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

Christella Antoni is a Consultant Speech & Language Therapist with over 20 years of experience and is the UK's leading expert in transgender voice modification. Christella VoiceUp will teach you how to feminize your voice. VoiceUp Complete contains the complete voice feminization course as 3 separate stages, plus pitch analysis and a graph so you can track your pitch change over time. With 10 minutes of daily practice, Christella VoiceUp will help you feminize your voice! The complete voice feminization course contains over 2 hours of voice therapy training in 3 stages - beginners, intermediate and advanced. Each stage contains five separate lessons which cover the fundamental aspects of voice and speech feminization. These involve modification of your resonance, pitch, intonation and vowel length. The final lesson of each stage combines these skills to help you develop control sustaining your feminized voice. All exercises are demonstrated by Christella and provide a consistent voice model with clear explanations. The exercises are based on Christella's successful treatment model and gradually increase in length and complexity as you progress through each stage to ensure that you will securely acquire voice feminization skills. Reviews ======= "I love it !!!! This is the best app ever !!! - I would thoroughly recommend it - and it has been very helpful" "So incredibly happy with this app. I have terrible anxiety and discomfort around my voice and having someone give clear instructions and lessons completely anonymously is a lifesaver. " "Creates an amazing feeling that anything is achievable with the right guide and support. Thank you so much for making this App available for everyone" "If you can’t / dont want to access voice therapy face to face for whatever reason, or you’re looking to supplement your face to face therapy – I’d definitely recommend it!" "Not cheap but worth it as really good and really is life changing when what comes out your mouth match your mind and body" "I'm using this app as a speech pathologist with my transgender clients. The techniques are extremely effective, easy to do, and my client's voice is becoming more feminine. Thank you Christella for developing this fantastic app."

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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
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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.