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.
Decaf is a different kind of scroll.
$0.99 · 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 Decaf: Art Feed: map the core Entertainment 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 content discovery options
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Lack of community features
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: In-app purchase limitations
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Limited artist information
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.
Decaf is a different kind of scroll. While most apps are designed to pull you deeper, Decaf asks you to slow down. To take a breath. To spend a moment with a painting that someone poured their life into creating, and that now belongs to the world. Over 23,000 paintings from nine of the world's great museums are available in Decaf, including works from the Metropolitan Museum of Art, the Rijksmuseum, the Art Institute of Chicago, the National Gallery of Art, the Smithsonian American Art Museum, the Cleveland Museum of Art, the Walters Art Museum, and the Belvedere in Vienna. These institutions have graciously made their collections available through open access programs, offering high resolution scans that do justice to the originals. Van Gogh, Rembrandt, Monet, Vermeer, and thousands of lesser-known works that deserve to be seen. There is no algorithm. No ads, ever. No one tracking what you linger on or skip. You can save a painting to your own private collection, or share one with someone via iMessage, WhatsApp, or email. But you cannot follow anyone, and no one can follow you. What you love is yours alone. This app is possible because of these institutions and their commitment to open access. Tap any institution name to learn more about the work, the artist, or the museum behind it. Decaf was made by a couple who still wanted to reach for their phones, but wanted that reach to feel restful rather than restless. The app is a small commitment to yourself: to ease past those first moments of less-stimulating scrolling, and to find something quieter and more lasting on the other side. At 99 cents, our promise is simple — no sponsorships, no incentives to keep you hooked. It's a one-time investment in a little more peace and focus. We hope you take your time with each painting. Find something you admire that you didn't think you would have. Look at each a little longer than planned.
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.