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.
music league lets you share and discover music (and rediscover some forgotten faves) by competing to determine the best songs for a particular theme!
Free · 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 Music League: 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 themes for leagues
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: No offline access to leagues
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: Inconsistent notifications
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.
music league lets you share and discover music (and rediscover some forgotten faves) by competing to determine the best songs for a particular theme! if you want to discover new music, you will, all while you share songs you’re passionate about. with some luck, you can claim to have better taste in music than your friends, family or coworkers. you can even play with someone from the other side of the planet! music league fans play for many different reasons …to win, to reminisce, to reconnect, to get to know each other. but also to discover new tunes and rediscover older favorites by looking at music in a totally new way. music league players will submit a song for each round's "theme". every round presents a new way to think about your music and a reason to share the songs you love, the songs you always thought deserved more love, or the songs you find that perfectly fit the theme. sample themes could include: - best cover song - songs that remind us of our freshman dorm - song i found tiktok - best song of 2025 so far - best song you've seen performed live - songs that remind us of the family cabin - songs to sing in the shower - song from an artist my child/parent should get into gameplay: - players submit a song that matches a theme - the app creates anonymous, shuffled spotify playlist … a free (or paid) spotify account is required. - players vote for which songs they like best or the song that fits the theme best - players can comment on songs as they vote - when the votes are in, you are able to see who submitted which songs, all the comments and, most importantly: who won the round! - a champion is crowned for each round… updating the leaderboard along the way - an overall champion for each music league is named after the last round - you’ll also see who gave you the most love…and the least! features: music league is always evolving. features are added along the way …more will be coming (don’t be shy, let us know what you think we should add!)
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.