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.
Play local music or stream from a file/media server with LMP
$2.99 · 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 LMP - Music Hub: 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 song library compared to competitors.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Difficult navigation in the search feature.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: User interface feels cluttered.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Inconsistent playback performance.
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.
Play local music or stream from a file/media server with LMP. Apple TV version included, with support for Emby, Navidrome, Plex, and Jellyfin. ▣ Import via iTunes or folder and play local tracks LMP was designed from scratch with offline music in mind. You can store music on your device in two forms: iTunes music or audio file. The first would require syncing with iTunes on Windows or Finder on Mac. To import as audio files, simply transfer them to the LMP Music folder on your device via any means. If you choose the latter, you will be able to enjoy additional features, such as editing of metadata via the LMP browser assistant. ▣ Connect to a cloud server and stream music from the server If you have insufficient storage on your device, you can also store your tracks on a server and stream from the server. File servers using SMB and WebDAV are supported. However, we recommend hosting a media server instead, via Plex, Emby, Navidrome or Subsonic due to faster import speeds. All tracks come together seamlessly, no matter how they are imported, providing a unified experience. You can enable the option in the settings to hide repeated tracks across servers. ▣ Manage playlists with ease LMP has its own playlist system that allows you to not only add tracks from all sources, but also artists. All tracks belonging to the artist would automatically be added to the playlist everytime you open the app or rescan, even newly added ones. With flexible artist splitting, you will be able to ensure that tracks get allocated to the right artist. When the AI playlist is enabled, LMP will also be able to generate a playlist for you based on your listening preferences. Usage data is only recorded if this feature is enabled, and all data recorded for this is stored locally, so you do not have to worry about data privacy. ▣ Supports CarPlay & Siri With support for CarPlay, you can start playing a playlist or control what's playing from your car's CarPlay console. Alternatively, you can also tell Siri to start playing a track or all tracks belonging to a particular artist, or use it to control the playback state of the current track. ▣ Support LRC lyrics LMP supports both embedded lyrics and .lrc files. Use the LRC or Enhanced LRC format, and the app will be able to autoscroll lyrics as the music plays. If you do not have time to add your own lyrics, you can specify the lyrics API to use, and the app will attempt to fetch lyrics of any track that is playing. ▣ Browser Assistant Manage local files on the app using the LMP browser assistant, which you can open on your computer's browser. Import new files or move/delete existing files using the Folders tool, edit music metadata using the Metadata tool or even manage your playlists using the playlists tool.
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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.