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
Matrix Music Visualizer VR
Finally a music visualizer that actually works! Experience your music like never before with immersive full 3D interactive synesthesia music visualization!
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 2.8
14 ratings · Below Average
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
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A product spec, screen plans, and build steps for your coding agent.
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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 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.
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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 Matrix Music Visualizer VR: 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
Integrate popular streaming services for broader song access.
Assumption to check: Limited song selection and no music library integration
Validate with people who use this workflow before building.
Hypothesis 2
Offer customizable visual styles to cater to different tastes.
Assumption to check: Visual effects may not appeal to all users
Validate with people who use this workflow before building.
Hypothesis 3
Implement thorough testing and optimization for performance stability.
Assumption to check: Crashes reported during playback
Validate with people who use this workflow before building.
Hypothesis 4
Focus on user feedback to enhance features and fix bugs.
Assumption to check: 2.8 rating indicates user dissatisfaction
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
Finally a music visualizer that actually works! Experience your music like never before with immersive full 3D interactive synesthesia music visualization! + Completely unique using cutting edge technology - you won't have seen anything like this before. Powerful sound-driven visuals. + Compatible with headphones - or without! + Fully compatible with m4a (iTunes downloads) and mp3 music files on your iPhone and iPad, simply choose songs and go! + Or use microphone to visualise ambient music, sound or voice! + VR and non-VR modes included! + Interactive - touch and be entranced by the rotating sound matrix. + Record and share your own custom psychedelic music videos using QuickTime on your Mac! + Unlock the secrets of deep trance and meditation with synesthesia-inspired sound-color sense mixing and lava-lamp liquid 3D visuals. Your eyes will love you forever. + Explore different sound-color mappings, lattice structures and textures! Extremely satisfying interaction. + All new 360 degree mode (seriously trippy). + Excellent for psychonauts, music lovers, artists, musicians, VJs and creating music videos! If you love this app you will also love other apps available from Ben, so check them all out! Love to all of you. Sound visualisation is a passion of mine, so please also check out my other work. I always appreciate feedback, so please rate the app now! Please note this app is not compatible with Apple Music or other music subscription services.
Written user reviews are not shown here. Check current App Store reviews >
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
Redux
axios
react-navigation
react-native-reanimated
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.
