App Overview

Fuel Tracker - Gas & Mileage icon

Fuel Tracker - Gas & Mileage

Marcel Mendes Filho · Finance

How much did I spend on fuel this month and in the last 6 months?

$9.99 · In-app purchases

PRICE
$9.99
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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What's included16 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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> SELECT BUILD PLATFORM:

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

// RORK SYSTEM PROMPT
Rork plan preview for Fuel Tracker - Gas & Mileage: 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 mileage tracking based on GPS.

Assumption to check: Users often find it tedious to log every transaction manually.

Validate with people who use this workflow before building.

Hypothesis 2

Add visualization features like charts and graphs.

Assumption to check: Difficulty in analyzing spending trends over time.

Validate with people who use this workflow before building.

Hypothesis 3

Allow users to customize fuel types and add categories.

Assumption to check: Lack of customizable settings for fuel types and categories.

Validate with people who use this workflow before building.

Hypothesis 4

Enhance notifications for reminders about fuel price changes or maintenance.

Assumption to check: Limited notifications for 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

How much did I spend on fuel this month and in the last 6 months? Is my monthly fuel spending average? Is my car's fuel consumption increasing? Is the cheapest fuel really the cheapest? When will the next maintenance be? Get instant answers to all these questions and more with the Fuel Tracker+ app. Record your refuelings in Fuel Tracker+ and get instant answers about car consumption, fuel efficiency, most economical fuels, monthly expenses, maintenance forecasts, and other information. Each answer is presented in charts and numerical tables. The charts have superpowers with filters and selectors that allow you to obtain different views with periods, vehicles, and fuels of your choice. Add as many vehicles as you want, and of different types: cars, trucks, motorcycles, and buses. Maintain a history of all refuelings with filters by vehicle, period, fuel type, fuel station, and payment method. 8 different types of charts with superpowers for you to analyze vehicles, refuelings, expenses, fuels, and fuel stations from all angles. Track fuel consumption trends by vehicle, fuel type, and fuel station. Record refuelings and the app will forecast vehicle maintenance. Syncs vehicles, refuelings and fuel stations across your devices and with family & friends (requires one time in app purchase). The app was designed with privacy in mind: no information you enter into the app, whether it's your vehicles, refuelings, or refueling locations, leaves the app. Everything stays within your device, in private. We take privacy so seriously that the app does not require account creation, meaning there's no way to associate your data with an email or phone number. That's why the app is paid: we don't sell your data in exchange for advertising. Terms of use (End User License Agreement): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

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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
expo-constants
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.