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
LA Comp
legendary sound with a modern twist.
$9.99 · In-app purchases
PRICE
$9.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
3 ratings · Top 5%
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 included15 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 LA Comp: 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
Expand instrument library or allow user uploads.
Assumption to check: Limited instrument options for composition
Validate with people who use this workflow before building.
Hypothesis 2
Implement real-time collaboration for composing.
Assumption to check: No collaboration features
Validate with people who use this workflow before building.
Hypothesis 3
Provide onboarding tutorials for new users.
Assumption to check: Lack of tutorials or guidance
Validate with people who use this workflow before building.
Hypothesis 4
Optimize app performance for low-end devices.
Assumption to check: Inconsistent performance on older devices
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
legendary sound with a modern twist. la comp reimagines a studio classic with unmistakable vintage tone bringing in-depth control. whether you're crafting silky vocal lines or adding punch to your mix, it's got the soul of a legend with a twist of modern-day flexibility. optical dynamics with ease. with side-chain, auto-gain, and in-depth control over tube and optical elements, you’ll have everything you need to shape your sound in ways you never imagined. mix anywhere. anytime. from the studio to your mobile rig, la comp is ready. with vst3, aax, au, and auv3 compatibility across macos, windows, iphone, and ipad, your sound goes wherever inspiration strikes—without compromising quality or control. features -10 included cross-platform presets for instant inspiration -auto-gain to keep the focus on your dynamics -analog warmth and drive with three tube flavors: vintage, modern, and stock -gain reduction (mono or stereo) and calculation options (rms or peak) -emphasis frequency control for tailored compression -stereo spread for enhanced width and space -side-chain input for creative mixing and shaping -allows external audio device use fully compatible with vst3, aax, au, and auv3.* *auv3 and standalone only on ios. mac/pc (sold separately) required for vst3 and aax.
Written user reviews are not shown here. Check current App Store reviews >
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.
