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.
"The Book of LULU" tells the story of Lulu, a princess from the world of books, and Mnemo, a robot who traveled from the far reaches of space, as they embark on a journey of adventure and friendship.
$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.
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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 The Book of Lulu: 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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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 book discovery options
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Cluttered user interface
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Slow loading times for books
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lack of social features
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.
"The Book of LULU" tells the story of Lulu, a princess from the world of books, and Mnemo, a robot who traveled from the far reaches of space, as they embark on a journey of adventure and friendship. Created in 1995 by French author Romain Victor-Pujebet as an interactive "click book," a rarity at the time, it was localized into 17 languages and released in over 20 countries, capturing the hearts of people worldwide. Almost 20 years later, in 2016, Romain and his original team reunited in Paris, driven by a desire to share this beloved tale with a new generation. They began developing a tablet version of the story. After Romain's unexpected passing during production, Brain Corporation, the company that released the Japanese version, took over the project to honor his legacy. As a tribute to Romain, they decided to release a revived edition of "The Book of LULU." After 30 years, this timeless story is reborn as an iPhone and iPad app."The Book of LULU" tells the story of Lulu, a princess from the world of books, and Mnemo, a robot who traveled from the far reaches of space, as they embark on a journey of adventure and friendship. Created in 1995 by French author Romain Victor-Pujebet as an interactive "click book," a rarity at the time, it was localized into 17 languages and released in over 20 countries, capturing the hearts of people worldwide. Almost 20 years later, in 2016, Romain and his original team reunited in Paris, driven by a desire to share this beloved tale with a new generation. They began developing a tablet version of the story. After Romain's unexpected passing during production, Brain Corporation, the company that released the Japanese version, took over the project to honor his legacy. As a tribute to Romain, they decided to release a revived edition of "The Book of LULU." After 30 years, this timeless story is reborn as an iPhone and iPad app. *We recommend downloading this app in a Wi-Fi environment.
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.