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
MuseDash
"Hitting while listening to music."
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.9
8,298 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 MuseDash: map the core Games 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
Introduce new game modes and challenges regularly
Assumption to check: Repetitive gameplay can lead to boredom
Validate with people who use this workflow before building.
Hypothesis 2
Offer more free content and discounts for bundles
Assumption to check: In-app purchases can feel expensive
Validate with people who use this workflow before building.
Hypothesis 3
Implement player feedback to adjust difficulty levels
Assumption to check: Difficulty balancing songs can frustrate players
Validate with people who use this workflow before building.
Hypothesis 4
Add multiplayer modes and social sharing options
Assumption to check: Limited social features can reduce engagement
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
"Hitting while listening to music." "Is that the call from another world?" [Game Starts Now—!!] Lovely girls or rhythmic music? If there’s a place for you to have them both… It must be the paradise of parkour & rhythm game — Muse Dash!! Huh?! Not your forte? It doesn’t matter! Who says you must have a strong sense of rhythm to win? Avoid is also a valid option (?) As long as you have 100% of passion, courage, and… love for lovely girls~ Rhythm and fight won’t be an issue [Gameplay] Dance to the music and beat enemies in the air and on the ground. Also, watch out for the obstacles!! What an easy, beginner-friendly rhythm game [Media Review] 可愛らしいビジュアルのキャラクターが躍動する、新感覚の2Dアクションスタイルのリズムゲーム ——IGN Japan “A bright exterior hides a surprisingly deep and engaging mash up”——POCKET GAMER Languages Supported: English 简体中文（Simplified Chinese） 繁体中文 （Traditional Chinese） 日本語（Japanese) 韩语 （Korean） Feedback: https://service.peropero.net/ Twitter:@MuseDash_EN @PeroPeroGuys
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.
