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
E-WALL
E-WALL: Tu Registro de Gastos.
$4.99 · In-app purchases
PRICE
$4.99
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 included14 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
Preview a sample Build Kit No email needed
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 E-WALL: map the core Finance 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
Implement a more guided onboarding process for linking accounts.
Assumption to check: Users struggle with linking multiple accounts.
Validate with people who use this workflow before building.
Hypothesis 2
Use machine learning for better transaction categorization.
Assumption to check: Transaction categorization can be inaccurate.
Validate with people who use this workflow before building.
Hypothesis 3
Introduce budgeting tools and alerts to help users manage finances.
Assumption to check: Lack of budgeting features.
Validate with people who use this workflow before building.
Hypothesis 4
Integrate chat support for real-time assistance.
Assumption to check: Poor user support options.
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
E-WALL: Tu Registro de Gastos. ¿Necesitas saber exactamente en qué se va tu dinero? E-WALL es una herramienta minimalista diseñada exclusivamente para el rastreo de egresos. Ideal para viajeros, empleados con gastos de representación o cualquier persona que necesite un control riguroso de sus salidas de dinero. Enfoque en lo que importa: Registro de Gastos al Instante: Anota cada pago en segundos, ideal para cuando estás fuera de casa o en un viaje de negocios. Control de Viáticos: Perfecta para usuarios que deben rendir cuentas o simplemente quieren monitorear sus consumos por proyecto o categoría. Categorización Personalizada: Organiza tus gastos por alimentación, transporte, hospedaje y más. Historial Detallado: Consulta tus registros anteriores para entender tus hábitos de consumo. Sin Complicaciones: E-WALL no administra ingresos ni saldos bancarios; se enfoca 100% en ayudarte a registrar cada centavo que sale de tu bolsillo. Simple, rápida y eficiente. Descarga E-WALL y mantén tus cuentas claras.
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
@react-navigation/native
react-native-paper
@supabase/supabase-js
BUILD KIT DIFFICULTY
Starter
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.
