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, made more fun
Free
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.
Your first Build Kit is free with a verified email.
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 NowPlaying: Music Discovery: 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: Can't play offline
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Algorithm doesn't understand taste
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Shuffle-only on free tier
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, made more fun. Find records you'd never have run into on your own, then learn everything about them. Who played bass, where it was recorded, what it samples. Featured on TechCrunch, MacRumors, iMore, 9to5Mac, DailyTekk, BGR, and more. ● Who it's for Anyone who wants to hear more new music, and know more about the music they already love. • Anyone hunting for their next favourite album, not another playlist • People who want a new record to try every day • Everyone who hears a great song and needs to know more, right now • Crate diggers and collectors who read every sleeve • Apple Music and Last.fm fans who keep track of what they play • Vinyl fans who want a proper display for the record that's spinning ● See more of your music SongDisplay turns your iPhone or iPad into a display for whatever's playing. Artwork, facts, and the story behind the song, updating as the music changes. Prop it up next to the turntable and let it run. • Album art or artist art, full screen • Kiosk Mode hides the buttons so only the music shows • Live Activity on the Lock Screen and Dynamic Island • Send it to a TV or monitor over AirPlay • Every session saved, so you can find that one song again • Read great insights about the song that’s playing ● Skip the algorithm A new Album of the Day, picked for the genres you actually listen to. Swipe through Album Discovery to find records nothing else would serve you, drawn from the Rolling Stone 500, 1001 Albums, the Apple Music Top 100, new releases, and your own library. Read Pitchfork reviews and Bandcamp Daily picks in the same place, plus music books worth reading. Come back tomorrow for the next one. ● Know the whole story Liner notes, verified facts, band members, samples and the songs they came from, awards, recording locations on a map, photography, set lists from the tour, and full lyrics. Translate any of it into your language, or let Song Story read it aloud. ● Find any song Catch what's playing around you with Shazam. Scan the barcode on a CD or record. Photograph an album cover to identify it. Point Visual Intelligence at a sleeve. Or search all of Apple Music. ● Keep it all together Save songs to Favourites and to your Apple Music library or a playlist. Scrobble to Last.fm. Add records to Discogs and songs to MusicThread. See your rated albums, On Repeat, and Heavy Rotation in one place. Build your Best of the year list and share it as an image. Open anything in Apple Music, Spotify, Tidal, YouTube Music, Deezer, Amazon Music, or Pandora. ● Everywhere you listen Five Home Screen and Lock Screen widgets, Control Center controls for listening, playing today's album, and scanning, plus Siri Shortcuts and Handoff between devices. NowPlaying also runs on Apple Watch, Apple TV, and Apple Vision Pro, in the same download. ● NowPlaying Gold No ads, Last.fm scrobbling, your full search and SongDisplay history, extra details like awards and band members, Kiosk Mode, and app icons you unlock by listening and exploring. NowPlaying works without it. Gold makes it better and keeps it going. Terms of use: https://nowplaying.page/terms Privacy policy: https://nowplaying.page/privacy
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.
Not assessed in a Build Kit yet.
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.