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.
Turn your Apple Watch into an offline music and video player.
$3.99 · 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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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 Player for Watch: 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 offline features for playback
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: No lyrics display
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: In-app purchase confusion
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Limited playlist management
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.
Turn your Apple Watch into an offline music and video player. Player for Watch lets you import local audio and video files, organize your music library, and play media directly from your wrist. Transfer songs, playlists, movies, lectures, podcasts, workouts, or other personal files to Apple Watch and enjoy them when you are away from your iPhone. Built for Apple Watch music and video playback: • Play local audio and video files on Apple Watch • Play through the Apple Watch speaker, AirPods, or connected headphones • Control music from Now Playing with full playback controls • Add music widgets and Control Center controls for playback, repeat, shuffle, like, lyrics, previous, and next • Use AirPods controls for convenient playback from your wrist • Use repeat, repeat one, shuffle, playback speed, and sleep timer controls • See the current playback queue and jump to what plays next • Auto-play the next song or video • Fine-tune music progress with a circular scrub gesture or the Digital Crown • Fine-tune video progress with the Digital Crown • Resume video and music from the last playback position Music library tools: • Browse music by Songs, Playlists, Albums, and Artists • Search your watch library from your wrist to quickly find songs and albums • Create playlists and manage playlist contents • Like favorite songs and access them from Liked Songs • Manage your watch music library from iPhone • Show, hide, and reorder albums and artists • Customize the Music home order on Apple Watch • Fetch matching album and artist artwork from Apple Music when available • Add or modify song cover art from iPhone • View embedded lyrics and imported .lrc lyrics • Show the current lyric line from widgets Video tools: • Watch videos in landscape mode • Compress videos before sending to improve Apple Watch compatibility • Organize videos with folder management • Hide selected videos from your library • Protect hidden videos with a passcode Personalization and accessibility: • Customize the watch app accent color • Use VoiceOver-friendly controls and widget labels Import media your way: • Import from the Files app • Import videos from the Photos app • Share files from other apps with export support • Transfer from Finder on Mac or iTunes on PC • Access Google Drive, Dropbox, iCloud Drive, and other cloud services through the Files app Player for Watch is designed for people who want a simple local media player on Apple Watch: offline music, local videos, lyrics, playlists, widgets, and playback controls without extra setup. Supported audio files: mp3, m4a, aac, wav, flac, m4b, aiff, aif, aifc, caf Supported video files: mp4, mov, m4v, 3gp, 3g2
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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.