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
Mozart AI: Song Generator
Turn any idea into a real, full song in minutes, right from your phone.Turn any idea into a real, full song in minutes, right from your phone.
Free
PRICE
Free
No in-app purchases
BUSINESS MODEL
Free
No overall Grossing estimate available
RATING
★ 4.6
565 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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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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Combine features and design from your favorite apps.
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What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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.
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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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 Mozart AI: Song Generator: 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
Generous offline download limits
Assumption to check: Can't play offline
Validate with people who use this workflow before building.
Hypothesis 2
Better personalization with explicit feedback
Assumption to check: Algorithm doesn't understand taste
Validate with people who use this workflow before building.
Hypothesis 3
Limited on-demand plays for free users
Assumption to check: Shuffle-only on free tier
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
Turn any idea into a real, full song in minutes, right from your phone.Turn any idea into a real, full song in minutes, right from your phone. No instruments. No experience. No music theory. Just describe the song you want, and Mozart writes the lyrics, sings the vocals, produces the track, and even creates the cover art. Then refine it, master it, and turn it into a music video to share. Mozart AI is free to start. Make your first songs today. MAKE A FULL SONG FROM ONE LINE - Describe a vibe, a story, or a genre, and Mozart writes and produces the whole track - Write your own lyrics, or let Mozart write them for you - Go full vocal or instrumental, in any genre, any mood - Choose from a range of music models to find your sound - Get original cover art for every song you make TURN SONGS INTO MUSIC VIDEOS - Generate a music video from any song in your library - Create characters, choose the look, and direct it scene by scene - Pick your aspect ratio for any platform - Post to the feed or share anywhere on social REFINE IT JUST BY TALKING Want to change something? Say it in plain words: - "Make the chorus bigger" - "Add soft female vocals with reverb" - "Give it a lo-fi feel" - "Master it for streaming" Your changes apply straight to the track, so you can shape it until it sounds exactly right. IT'S YOURS TO RELEASE - Full commercial rights on every original song you create - Free downloads. Your music is yours to keep - Release it on streaming, social, or anywhere you like DISCOVER AND GET INSPIRED Explore songs and music videos from creators around the world, follow the artists you love, and find new sounds across every genre. START FREE Every new account gets 180 free credits to start creating right away, no subscription required. Upgrade any time for more monthly credits, the latest models, longer music videos, and advanced editing tools. SUBSCRIPTIONS Mozart AI is free to start. Paid plans add more monthly credits and unlock advanced features: - Creator: regular song creation, latest models, unlimited downloads - Pro: more credits, priority models, music videos up to 1 minute, advanced editing on the web app - Premium: maximum credits, all models, music videos up to 4 minutes, advanced editing on the web app All plans include full commercial rights. Available monthly or annually. Credits refresh each billing cycle and do not roll over. Manage or cancel anytime through your App Store account. Terms of Service: https://mozartai.com/terms-of-service
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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
Expo AV
Supabase
RevenueCat
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.
