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
AI Song Generator - Zona
Zona: The Ultimate AI Song Generator
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
15,752 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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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/
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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 AI Song Generator - Zona: 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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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
Zona: The Ultimate AI Song Generator Creating music has never been easier! Whether you're a professional songwriter or someone who simply loves music, Zona helps you turn your ideas into fully-produced songs in just a few taps. Turn Your Ideas into Songs with AI Got a melody in mind? Just describe your dream song in a few words—whether it’s an upbeat pop hit, a raw hip-hop track, or an epic orchestral piece—and let Zona’s advanced AI generate the perfect soundtrack for you. Sing with Your Voice Just read, record, and let Zona turn your voice into a personalized song. Create music that's truly yours—authentic, emotional, and unique. Easily Craft the Perfect Lyrics Struggling with lyrics? No problem! Write your own heartfelt verses or let Zona suggest lyrics that match your mood and genre. Our AI-powered songwriting assistant makes lyric creation effortless. No Instruments or Musical Skills Required Don't play an instrument? Can’t sing? No worries! With Zona, all you need is your creativity. Create professional-quality music without any prior experience. Explore Endless Musical Styles Mix and match genres effortlessly. Whether it’s pop, rock, electronic, hip-hop, classical, or something unique, Zona lets you experiment and create your signature sound. Share Your Music with the World Ready to showcase your music? Export your tracks in high-quality audio, perfect for sharing with friends, uploading to streaming platforms, or even releasing your next big hit. Why Choose Zona? - AI Song Generator: Instantly create unique songs with cutting-edge AI. - Sing with Your Voice: Turn your voice into a song and shine with a track that's truly yours! - User-Friendly Interface: Music production made simple and accessible. - Versatile Genre Selection: Explore a wide range of musical styles. - High-Quality Audio Export: Share your music professionally. - No Musical Skills Needed: Just bring your ideas, and Zona does the rest. Download Zona today and start making music effortlessly! Join a global community of creators and bring your musical vision to life with the most powerful AI song generator. Zona Premium Subscription: • To use the features in the app, you need to subscribe. • Subscriptions are billed automatically at the rate depending on the selected subscription plan. Privacy Policy: https://madduck.com/privacy-policy Terms of Use: https://madduck.com/terms-of-use
Written user reviews are not shown here. Check current App Store reviews >
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 more user control over song structure and lyrics.
Assumption to check: Limited customization options for generated songs
Validate with people who use this workflow before building.
Hypothesis 2
Implement clearer pricing and benefits for subscriptions.
Assumption to check: In-app purchases can be confusing
Validate with people who use this workflow before building.
Hypothesis 3
Optimize AI processing for faster results.
Assumption to check: Long wait times for song generation
Validate with people who use this workflow before building.
Hypothesis 4
Add options for users to share their generated songs on social media.
Assumption to check: Lack of social sharing features
Validate with people who use this workflow before building.
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.
