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.
App Overview
Vocalista: Learn to Sing
Vocalista features a growing library of expertly crafted vocal exercises and theory lessons to help you become a better singer.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
2,121 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.
Build your own version
Build Kit
Make this idea yours
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Add to a Remix
Combine features and design from your favorite apps.
Kit ready. Verify your email to download it.
Generating… usually about a minute.
Make it yours Optional
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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/
Preview a sample Build Kit No email needed
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
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.
JavaScript is required to complete mailbox verification.
Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Vocalista: Learn to Sing: map the core Music workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
Preview ready. Verify your email to reveal and copy the full prompt.
JavaScript is required to complete mailbox verification. Return to this prompt preview.
Continue in Rork >
Affiliate link: CloneChart may earn a commission at no extra cost
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
Incorporate chat or forum features for user interaction.
Assumption to check: Limited community interaction features
Validate with people who use this workflow before building.
Hypothesis 2
Implement AI-driven personalized lesson recommendations.
Assumption to check: Lack of personalized learning paths
Validate with people who use this workflow before building.
Hypothesis 3
Add real-time pitch detection and feedback during practice.
Assumption to check: Inadequate feedback on singing
Validate with people who use this workflow before building.
Hypothesis 4
Offer more flexible pricing plans and a comprehensive free tier.
Assumption to check: Subscription pricing may deter 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
Vocalista features a growing library of expertly crafted vocal exercises and theory lessons to help you become a better singer. PERSONALIZED EXERCISES All exercises are adjusted to your vocal range so you can do them with ease. REAL-TIME PITCH DETECTION When you exercise, you get real-time pitch feedback that helps you hit every note spot-on. AI-POWERED FEEDBACK Get insights on your pitch, breathiness, and resonance after each exercise and track your progress.* DAILY GOAL Set how many exercises you want to complete each day. Just a few minutes every day can go a long way! BITE-SIZED THEORY LESSONS Grow your knowledge about the foundations of singing. ACHIEVEMENTS Earn badges for reaching new milestones on your singing journey. Stay motivated and track your progress as you work towards your singing goals! EXERCISE REMINDER Practice makes progress — that’s why we want to make it easy for you to build a habit. You can set an exercise reminder at a preferred time and get notified to start your session. PERFECT FOR WARM-UPS Just need a quick vocal warm-up? We’ve got you covered. With Vocalista, you always have an instructor with you — so you are always ready for your next big performance. * Breathiness and resonance detection are available on iPhone 13 Pro, iPhone 13 Pro Max, all iPhone 14 models, and later. Terms of Use: https://vocalista.app/terms-of-use/
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
< Scroll to see more >
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
Supabase
@react-navigation/native
expo-av
react-query
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.
