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
MoneyLog - Easy Bookkeeping
MoneyLog is a simple personal finance app, easy to use like handwritten notebook.
$0.99 · In-app purchases
PRICE
$0.99
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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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 MoneyLog - Easy Bookkeeping: 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 advanced analytics and visualizations to provide insights.
Assumption to check: Users often find it hard to track their finances effectively.
Validate with people who use this workflow before building.
Hypothesis 2
Use machine learning for automatic categorization.
Assumption to check: Difficulty in categorizing transactions accurately.
Validate with people who use this workflow before building.
Hypothesis 3
Add detailed budget management tools with alerts.
Assumption to check: Limited budget tracking features.
Validate with people who use this workflow before building.
Hypothesis 4
Integrate customizable reminders for bills and expenses.
Assumption to check: Insufficient notifications for bill reminders.
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
MoneyLog is a simple personal finance app, easy to use like handwritten notebook. This app is recommended for those who want to record income/expense balance easily and do not need complicated setting and service linkage. Simple and easy to understand, so you can keep tracking with enjoying. Feature - Vertical Calendar. Easy to see & Date selection is quick and easy. - Recording of Income/Expense/Transfer, Enter data with just a few taps. - Easy-to-compare bar graph. Display in descending order of amount. Identify items that need to be reviewed at a glance. - Display annual trend graph - Balance management. By managing the remaining, you can notice that you forgot to enter. - Category names can be edited freely. - This app is completely offline. Data is stored securely on the device. - CSV output. For data backup or For data processing with spreadsheet software.
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
Zustand
React Navigation
React Native Paper
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.
