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
Shell: Fuel, Charge & More
The Shell App is designed to help you make the most of your stop!
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
87,970 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 included17 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 Shell: Fuel, Charge & More: map the core Navigation workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
The Shell App is designed to help you make the most of your stop! Shell® Fuel Rewards® Program •Join the Shell® Fuel Rewards® Program to save at the pump. See full Terms & Conditions for details. •Earn additional fuel savings by using mobile payment in the Shell App. •The more you fill, the more you save. Platinum Status members save 10c/gallon. •View and manage your rewards in the Shell® Fuel Rewards® Hub, and easily link your loyalty accounts for added savings. •Browse Fuel, In-store, Dining, Grocer, and Participating brand offers – all in one app. •As a new Shell® Fuel Rewards® Member, you'll save 10c/gal on your 1st fill, 20c/gal on your 2nd fill, and 30c/gal on your 3rd fill. •As a Shell® Fuel Rewards® Member, stack your loyalty savings with 4% back when you fill up or charge at Shell using the new Shell Performance Elite Credit Card. Fast, secure mobile payment •Easy, convenient payment from your phone—no need to swipe a credit card or enter your Fuel Rewards Alt ID. •Use mobile payment with your Shell branded credit card, Mobile Checking, Apple Pay, or directly add your credit/debit card: Visa, Mastercard, American Express or Discover. •Add or buy Shell eGift cards directly in the App. •View your receipts, rewards, and offers all in one place. Find a Shell station •Quickly locate nearby Shell stations, view fuel pricing and dining offers, and activate in-store offers. Charge your EV with Shell Recharge •Access 120,000+ charging points in the Shell Recharge roaming network across the U.S. •Find chargers, check availability, start/stop charging, and pay—all in the App. •Save on EV Charging with Shell Recharge Rewards! See Full Terms and Conditions for details. This app is intended for use by individuals aged 18 and older in the United States. Equilon Enterprises LLC doing business as Shell Oil Products US, LLC (“SOPUS”) is the data controller and determines how your personal information is collected and used in this app. Shell Information Technology International B.V. is the Developer of the app and publishes it on behalf of SOPUS.
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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 a better search and filter functionality.
Assumption to check: Difficulty finding nearby stations quickly.
Validate with people who use this workflow before building.
Hypothesis 2
Offer various payment methods for convenience.
Assumption to check: Limited payment options.
Validate with people who use this workflow before building.
Hypothesis 3
Enhance real-time data fetching for accurate pricing.
Assumption to check: Slow updates on fuel prices.
Validate with people who use this workflow before building.
Hypothesis 4
Allow users to save favorite stations and customize their experience.
Assumption to check: Lack of user customization features.
Validate with people who use this workflow before building.
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
Axios
React Navigation
React Native Maps
Async Storage
BUILD KIT DIFFICULTY
Advanced
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.
