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.
Wind Chimes is a generative MIDI instrument built around a physically simulated row of wind chimes
$4.99
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.
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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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Wind Chimes - Generative MIDI: 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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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
Assumption to check: Limited user engagement due to lack of social features
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Potential for steep learning curve with MIDI parameters
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Limited sound customization options
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No offline functionality
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Wind Chimes is a generative MIDI instrument built around a physically simulated row of wind chimes. A simulated wind field sways the chimes, and when two collide, the struck one fires a MIDI note. Play it by hand, or let the wind play on its own. REAL WIND, REAL COLLISIONS • Up to 16 chimes hang in a graduated row • Chimes ring by knocking into each other, not a clapper • Tap, hold, or drag any chime to play it by hand • Gusts sweep across the row instead of hitting all at once CUSTOMIZE EVERY CHIME • Choose anywhere from 2 to 16 chimes • Spread the row from tightly packed to wide open • Length and Weight shape each chime's swing and reach • Go full screen for a bigger, more zen performance A GENERATIVE MIDI PLAYGROUND • Every chime's note comes from the current key and scale • Turn any chime's note off, or reassign it freely • Every chime's real swing angle can drive generative CC modulation • Up to 16 chimes across up to 16 channels, endless generative variety MAKE IT YOURS • Pick from a set of beautifully designed visual themes • Switch between Free timing and a quantized grid • New Wind reseeds the sequence, keeping every setting the same • Randomize rolls a brand-new layout, tuning, and wind in one tap BUILT FOR AUV3 HOSTS • Runs as a full AUv3 MIDI Generator in any compatible host • Automate every wind and tuning parameter from the host • MIDI timing is sample-accurate, synced to the host's own tempo • Presets sync over iCloud across devices, the app, and AUv3 Play standalone with a built-in sampler for instant sound, or load Wind Chimes as a silent-audio AUv3 MIDI Generator and route it into any instrument you like.
Written user reviews are not shown here. Check current App Store reviews >
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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.