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.
App Overview
A Arte da Prudência
Descrição:
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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.
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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included15 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Screen plan
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.
Differentiate and validate
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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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for A Arte da Prudência: 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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Opportunities
AI-GENERATED OPPORTUNITY HYPOTHESES
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
Focus on curated content and user reviews to enhance book discovery.
Assumption to check: Limited content selection compared to larger platforms
Validate with people who use this workflow before building.
Hypothesis 2
Implement gamification features such as achievements and reading challenges.
Assumption to check: User engagement drops after initial purchase
Validate with people who use this workflow before building.
Hypothesis 3
Ensure a smoother user experience for restoring purchases with clear prompts.
Assumption to check: Poor handling of in-app purchase restoration
Validate with people who use this workflow before building.
Hypothesis 4
Introduce features for adjusting font sizes, background colors, and text formats.
Assumption to check: Limited customization options for reading experience
Validate with people who use this workflow before building.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
Descrição: O livro "A Arte da Prudência" do importante escritor espanhol do século XVII Baltasar Gracían caracteriza-se por uma manual de estratégia para a vida . Neste livro através dos 300 preceitos morais são explanadas as questões sobre as relações humanas, tendo como princípio a instabilidade do ser humano no campo emocional. Na sua obra o escritor não usa sentimentalismos, ou utopias. Seu modo de pensar se baseia na realidade dos fatos. Para Gracian, o ser humano é imprevisível e age em todo o tempo buscando seus próprios interesses. Ser precavido ante as circunstâncias para obter o equilíbrio é a base de seus ensinamentos. Funcionalidades do App: - Use o microfone para gravar anotações sobre os estudos; - Busca por palavras-chave; - Possibilita enviar e-mails com os capítulos; - Possibilidade de criar suas anotações; - Possibilidade de criar suas anotações de áudio; - Adição de capítulos aos favoritos; - Não necessita de acesso a internet; - Testado em aparelhos com 3.1.3 instalado - Entre outras funcionalidades; - Leitura em tela cheia; - Leitura em modo noturno;
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
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Build scope
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Define the first version
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Set boundaries
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Check the hard parts
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
SUGGESTED BUILD STACK
React Native
Expo
Supabase
TypeScript
React Navigation
Zustand
BUILD KIT DIFFICULTY
Intermediate
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.
