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.
Literavox is a private audiobook player for the files you already own
$0.99
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 LocalAudioBooksPlayer: map the core Books workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Literavox is a private audiobook player for the files you already own. It's not a store and not a streaming service — you bring the MP3 files, and Literavox plays them the way audiobooks deserve: resume, variable speed, chapter navigation, lock-screen controls, and background audio. YOUR FOLDER IS YOUR LIBRARY Point Literavox at a folder of audiobooks (each book is one subfolder of MP3 files) and it indexes everything for you. There's no hidden database — you stay in full control of your files in the Files app or Finder. ON-DEVICE AND iCLOUD DRIVE Keep your library locally or in an iCloud Drive folder and use it across all your devices at once. Share that iCloud folder with family and friends — no extra sync required. PRIVACY FIRST No accounts. No sign-in. No tracking. Playback works fully offline. The network is only used optionally — to fetch cover art or free public-domain titles. BUILT FOR LONG LISTENS • Resume exactly where you left off • Skip forward and back 30s • Variable speed: 0.8×–2.0× • Chapter list with seamless transitions • Whole-book progress bar with the current chapter highlighted • In-track bookmarks • Favourite and Finished flags + filters • Lock screen, headphone, and CarPlay controls • Background and locked-screen playback FREE, LEGAL LIBRARIES Add built-in free sources and download titles straight into your library: • LibriVox — public-domain audiobooks read by volunteers • Project Gutenberg — synthetic narration • Wolne Lektury — Polish classics read by actors (CC BY-SA) Downloaded titles become ordinary audiobooks on your device — fully offline, with proper attribution and license info. WHY LITERAVOX Because your audiobooks are your files. No store lock-in, no DRM, no subscription required to listen. Just a clean, fast player that respects you and your collection. Fully localized in English and Polish.
Written user reviews are not shown here. Check current App Store reviews >
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 functionality for organizing audiobooks.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Lack of search filters.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Minimal user settings.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No social sharing options.
Validate with people who use this workflow before building.
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.