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
O Livro dos Espíritos
Atenção: Se tiver algum problema após esta atualização, remova e reinstale o app;
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.0
1 ratings · Top 30%
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 O Livro dos Espíritos: 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
Add user-generated content and community features.
Assumption to check: Limited content and chapters available
Validate with people who use this workflow before building.
Hypothesis 2
Implement offline access for chapters.
Assumption to check: No offline reading mode
Validate with people who use this workflow before building.
Hypothesis 3
Enhance UI/UX with modern design elements.
Assumption to check: Basic design lacks engagement
Validate with people who use this workflow before building.
Hypothesis 4
Provide clearer information about in-app purchases.
Assumption to check: In-app purchase process is unclear
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
Atenção: Se tiver algum problema após esta atualização, remova e reinstale o app; Leia a descrição e as funcionalidades do app: O Livro dos Espíritos é o primeiro da série de cinco livros básicos da Doutrina Espirita. Consta de uma Introdução e 1018 perguntas formuladas aos Espíritos. As respostas em O Livro dos Espíritos, sempre muito inteligentes, objetivas e intelectualizadas, abrangem temas os mais variados e ligados a questões transcendentais até então não satisfatoriamente respondidas. É, portanto, um livro de interesse para todas as pessoas de todas as religiões, pois contém uma abordagem científica de temas existenciais, dos mais simples aos mais complexos. Funcionalidades do App: * Use o microfone para gravar anotações sobre os estudos; * Uma ferramenta ótima para o estudo da Doutrina Espírita, conforme depoimento dos usuários; * Possibilita enviar e-mails com capítulos; * Possibilidade de criar suas anotações; * Adição de capítulos aos favoritos; * Não necessita acesso a internet (wi-fi/3G; * Testado em aparelhos com 3.1.3 instalado; * Entre outras funcionalidades;
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
Zustand
React Navigation
React Native Paper
Axios
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.
