App Overview

FIRE and Retirement Calculator icon

FIRE and Retirement Calculator

abdelali zahi · Finance

The most advanced real-time retirement and FIRE (Financial Independence, Retire Early) simulator on the App Store.

$9.99 · In-app purchases

PRICE
$9.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
5.0
2 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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Combine features and design from your favorite apps.

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What's included18 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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Free quick prompt For a smaller starting point

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 FIRE and Retirement Calculator: 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

Allow users to save multiple scenarios and customize inputs further.

Assumption to check: Limited customization options for savings inputs

Validate with people who use this workflow before building.

Hypothesis 2

Add reminders and suggestions based on user progress.

Assumption to check: No reminders for adjusting savings plans

Validate with people who use this workflow before building.

Hypothesis 3

Provide detailed explanations and tips alongside results.

Assumption to check: Complexity in understanding the results

Validate with people who use this workflow before building.

Hypothesis 4

Introduce community forums for users to share experiences and tips.

Assumption to check: Lack of community features

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

The most advanced real-time retirement and FIRE (Financial Independence, Retire Early) simulator on the App Store.   * How do different market scenarios affect my plan: a powerful (Monte Carlo) engine that runs a thousand different simulations in real time every time you change any parameter. * How does changing my asset allocation affect my plan: choose the most appropriate asset allocation for you during both the accumulation (before retirement) and withdrawal (during retirement) phases * How do investment fees affect me: Understand the impact of fees on your investments and retirement in the long run * Salary and savings: Find your optimal savings rate and evaluate the impact of salary growth on your retirement * Retirement Spending: Find out how much you can spend in retirement taking into consideration other income sources, inflation and taxes. * Capital Market assumptions: Evaluate the impact of higher / lower asset class returns on the viability of your plan * Chance of success: calculate the odds of success of your plan or have the engine modify your plan to improve your odds * Insight library: a growing library of optimization tools that allow you to answer questions like: + When can I reach Financial Independence? + How much can I safely spend in retirement? + How much should I invest (over time) to reach my target? * Intuitive no-jargon summary: a beautiful report that summarizes your plan in plain words and intuitive charts

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
react-native-chart
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.