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.
Do you use the Music app? Then...
$0.99 · 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.
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Combine features and design from your favorite apps.
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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 Playlist Tools: 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 features compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Low user ratings due to bugs
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: In-app purchases for basic features
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Not user-friendly navigation
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.
Do you use the Music app? Then... Remove Duplicates ================ Do you have playlists that contain duplicates or same songs from multiple artists? Music Tools will detect and remove these duplicates without the need for iTunes. The process of removing songs detects duplicates and do preselect duplicate songs for deletion. You can adjust the preselection of songs to suit your needs. The song removal process creates a new playlist that does not contain duplicate songs. Import songs =========== If you have an Apple Music subscription and need to add lots of songs, use the feature to import songs into Music. Songs can be imported from selected text from any application using the Share function. Or from a text file (.txt extension) in any of your applications. Each song title (+ artist name) must be on one line. The song import process looks for a song title in Apple Music service. For each song title, it selects one match and offers other possible songs. After you checking the search, enter the name of the new playlist and start the import process. Import adds songs from Apple Music to your library in one batch.
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.