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.
Effortlessly track across platforms
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 Shelf: music, books, movies: map the core Utilities 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 categories for item organization
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: No offline access to saved items
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: In-app purchase confusion
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.
Effortlessly track across platforms Connect Spotify, Netflix, Apple Music, Letterboxd, Goodreads, and more. Shelf automatically organizes what you watch, read, listen to, play & more into one evolving profile. -See your taste from every angle. -View your top artists and genres. -Scroll a chronological history of what you’ve watched and read. -Keep a living record of your cultural life. Get personalized recaps -Weekly and monthly summaries show what defined your time and how your taste shifts. Unlock experiences powered by your Shelf -Dive into insights, comparisons, trend breakdowns, and evolving tools built around your data. The more complete your Shelf, the more you can access. Browse friends’ Shelves -See what people you care about are into and explore their taste across categories. Customize your profile -Personalize your Shelf so it reflects who you are. Your data, on your terms -Private by default. You control what’s connected and what’s visible. Your history stays yours. -We safeguard your data with cutting-edge encryption tech. -The creators of Shelf are pioneers behind people taking back control of their data from the big platforms. We’re data rights activists and will fight (and build) until we all have control and ownership over our own data (see more here: https://share.shelf.im/data-rights). Shelf grows with you. -The more you add, the clearer the patterns become. The more complete your Shelf, the more it understands your taste. -It’s not another recommendation feed or social app. It’s a living record of what you’ve been into— and what that says about you. Shelf is created by a team in NYC and loved by people across the world! Featured in TechCrunch, Business Insider, Harvard Business Review and more. Follow along for updates and memes: @getashelf
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.