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.
Fuel Monitor is your assistant to help keeping an eye on the cost for cars: fuels, charging, services, repairs and other fees
$1.99 · In-app purchases
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.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Fuel Monitor Pro: 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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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
Assumption to check: Limited vehicle management features
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: No integration with fuel price APIs
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of detailed analytics
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: In-app purchases may confuse users
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Fuel Monitor is your assistant to help keeping an eye on the cost for cars: fuels, charging, services, repairs and other fees. Just add the miles, gallons and cost, it could calculate the fuel economy for gasoline car, and energy consumption for electric car automatically, which would help you save your money and time. Set the services interval, it would intelligently list the due date or odometer of each maintenance in schedule. Key Features: Vehicles ⁃ Supports multiple vehicles. ⁃ Manage basic info of your cars: VIN, Plate, Tire Size and engine type etc. ⁃ Track expense for each vehicle separately. Fuels ⁃ Calculate fuel consumption automatically. ⁃ Calculate cost per mile/km. ⁃ Track fuel logs including fuel-up, price, total cost, date, odometer, location, etc. Energies ⁃ Calculate energy consumption automatically. ⁃ Calculate cost per mile/km. ⁃ Track charging logs including reading, price, total cost, date, percentage after charging, location, etc. Services ⁃ Track kinds of services’ logs including odometer, time, cost, labor cost and note. ⁃ Default and custom service types and maintenance interval. ⁃ Set time of in advance reminding by days or odometer. ⁃ List the next due date/odometer of each service type. Repairs ⁃ Track kinds of repairs logs including odometer, time, cost, labor cost and note. ⁃ Default and Custom repair expense types. Other fees ⁃ Track kinds of other fees, such as parking, washing, decorating, insurance, etc. ⁃ Default and Custom other expense types. Powerful reports ⁃ Pie chart to show cost & percentage of fuel, service, repair and other expenses. ⁃ Bar chart to show the cost of fuels/energy, service, repair and other expenses by week, month, year or custom. ⁃ Pie chart to show the cost & percentage of each service/repair/other expense type by week, month, year or custom. ⁃Table to list fuel statistics, including average fuel economy, avg cost per mile/km, total miles and etc. ⁃ Line graph to show the trend of fuel economy and cost per mile/km. ⁃ Line graph to show recent fuel price trend. ⁃ Line graph to show recent fuel/energy cost. ⁃ Line graph to show recent service cost. ⁃ Line graph to show recent repair cost. ⁃ Line graph to show recent other cost. Extra highlight ⁃ Clean and tidy UI. ⁃ Calendar overview of data. ⁃ Supports maps to track location info. ⁃ Supports both US and SI unit. ⁃ Supports backup & restore through iCloud and Dropbox. ⁃ Export data by email in format of PDF, CSV & HTML. ⁃ Supports Printing data directly by this app. ⁃ Supports importing data from a CSV file. ⁃ Supports customizing the digital decimal of cost, fuel economy, etc. ⁃ Supports Apple Watch. ⁃ Supports universal version (available on both iPhone and iPad). Please contact us by email for any feedback or suggestion: [email protected].
Written user reviews are not shown here. Check current App Store reviews >
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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.