App Overview

ET - Expense Tracker icon

ET - Expense Tracker

金 郭 · Finance

Core Value: Make Your Finances Clear, Say Goodbye to Living Paycheck to Paycheck

$19.99 · In-app purchases

PRICE
$19.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
5.0
7 ratings · Top 5%

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/
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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.

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.

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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Quick prompt

> SELECT BUILD PLATFORM:

Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

// RORK SYSTEM PROMPT
Rork plan preview for ET - Expense Tracker: 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 automatic transaction categorization using AI.

Assumption to check: Users find it hard to categorize transactions accurately.

Validate with people who use this workflow before building.

Hypothesis 2

Add detailed budget tracking with alerts and progress tracking.

Assumption to check: Limited budget tracking features.

Validate with people who use this workflow before building.

Hypothesis 3

Improve the Add Transaction flow with predictive text and shortcuts.

Assumption to check: Inconvenient manual entry of transactions.

Validate with people who use this workflow before building.

Hypothesis 4

Add features for tracking and alerting recurring expenses.

Assumption to check: No recurring expense tracking.

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

Core Value: Make Your Finances Clear, Say Goodbye to Living Paycheck to Paycheck Easily track every dollar and gain full visibility of your finances. Say goodbye to “living paycheck to paycheck” and keep your finances transparent and organized! Do you feel that your income is not small, but you never know where your money goes each month? Accounting Book is a simple and efficient professional bookkeeping app. It is not just a tool for recording income and expenses, but also a powerful assistant to optimize spending and achieve financial goals. Build a habit of timely bookkeeping and make personal finance easy and stress-free. CORE FEATURES: - Fast Entry: Supports bill snapshots (cropping available), built-in calculator, decimal input; record each transaction in seconds. - Auto Import: Supports intelligent import from Alipay and WeChat bills, freeing your hands from manual entry. - Professional Analysis: Powerful chart analysis shows monthly income and expense structure; compare weekly, monthly, or quarterly to understand cash flow at a glance. - Budget Manager: Set total or category budgets, compare actual spending in real time, and avoid overspending. - Financial Security: Protect your data with Face ID / password lock. - Cloud Sync: iCloud cloud sync updates data automatically across devices. ADDITIONAL FEATURES: Detailed Records: View, edit, and delete transactions anytime; export PDF reports for printing or sharing. Custom Categories: Add income and expense categories to suit your personal needs. Scheduled Entry: Automatically record recurring income and expenses. Theme Selection: 12 themes to personalize your app experience. Data Sharing: Supports AirDrop, email attachments, cloud drives, and WiFi for importing and exporting data. Localized Support: Daily reminders, local and custom currency symbols, support for lunar calendar. FREQUENTLY ASKED QUESTIONS:: Q: How to quickly import old data when switching phones? A: Two convenient methods: Email/Cloud Backup: On the old phone, go to "More" > "Data Backup & Import" > "Data Backup", choose email or cloud backup; on the new phone, open the attachment and select "Import from Accounting Book". Advanced Users: Use AirDrop to send data to the new phone, then select Accounting Book to receive and import. CONTACT US: We value every piece of feedback. To report bugs or request features, go to "More" > "Feedback" and send us an email. We will respond as soon as possible. Privacy Policy:https://f.n-years.com/en/docs/mtracker/privacy_statement Third-Party Information Sharing List:https://f.n-years.com/en/docs/mtracker/third_party_description

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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
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.