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.
Classical music reinvented
$9.99 · In-app purchases
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.
First kit free with a verified email
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 The Orchestra: 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 interactivity with the music pieces
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: High subscription cost compared to competitors
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of social sharing features
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Navigation can be confusing
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.
Classical music reinvented. Esa-Pekka Salonen conducts the world-renowned Philharmonia Orchestra, performing extracts from eight works representing three centuries of symphonic music. Features: • An orchestra at your command: Experience classical music like never before with fascinating features, including video, synchronized score, simplified score and commentary by Esa-Pekka Salonen. • Expert explanations: World-class musicians explain their role in the orchestra and demonstrate how their instruments work. Use a keyboard to play samples of the instruments, and view each one in glorious detail with 360° rotations. • Discover the BeatMap: This groundbreaking visualization of the performances shows different sections of the orchestra pulse in time with the music, helping you understand the complexity of each piece. Hold down your finger to hear different sections of the orchestra in isolation. • Unparalleled access: Watch beautiful multi-camera video of the acclaimed Philharmonia Orchestra, and switch effortlessly between different angles and sections of the orchestra. • Discover the story: Read insightful text on the pieces, composers and instruments specially written by Mark Swed, music critic of the LA Times. The Music: • Haydn: Symphony No 6 (1st movement) • Beethoven: Symphony No 5 (excerpt from 4th movement) • Berlioz: Symphony Fantastique (March to the Scaffold) • Debussy: Prélude à l’après midi d’un faune • Mahler: Symphony No 6 (exposition from 1st movement) • Stravinsky: The Firebird (excerpt) • Lutosławski: Concerto for Orchestra (2nd movement) • Salonen: Violin Concerto (2nd and 3rd movements) If you enjoy The Orchestra, don’t forget to rate it and leave a review – it really helps!
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.