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
ExtraMile®
Turn everyday stops into rewards with the ExtraMile® app
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.9
3,102 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 ExtraMile®: 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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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 real-time price updates and user contribution features
Assumption to check: Inaccurate gas prices compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Expand redemption options and provide personalized rewards
Assumption to check: Limited rewards redemption options
Validate with people who use this workflow before building.
Hypothesis 3
Optimize map data loading and caching for faster access
Assumption to check: Map loading delays
Validate with people who use this workflow before building.
Hypothesis 4
Include offline map capabilities for users in low connectivity areas
Assumption to check: No offline access to maps
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
Turn everyday stops into rewards with the ExtraMile® app. Earn points on qualifying in-store and fuel purchases at participating locations - redeem them for savings on Chevron and Texaco fuel. Unlock exclusive member offers, participate in club programs to earn free items, and enjoy convenient mobile payments. Plus, receive a new member reward when you join. ExtraMile, Chevron, and Texaco apps all connect to the same rewards program, giving you access to your points balance, fuel savings, and exclusive offers across all apps. New Member Rewards Join ExtraMile Rewards® and enjoy a new member reward when you sign up and complete enrollment in the app. Earn Points on Select In-Store and Fuel Purchases Get rewarded for purchases you already make. ∙ Earn points on qualifying purchases at participating ExtraMile® convenience stores ∙ Earn points on qualifying fuel purchases at participating Chevron® and Texaco® stations ∙ Redeem rewards for up to 50¢ off per gallon on qualifying fuel purchases at participating locations ∙ Track your rewards balance directly in the app Unlock Exclusive Rewards and Savings As an ExtraMile Rewards member, you'll enjoy: ∙ Exclusive member-only offers and discounts ∙ Freebies on ExtraDay® and select national holidays ∙ Convenient digital reward tracking Track Your Favorite Club Programs Keep track of your progress and earn free items by participating in club programs. ∙ Mile One Coffee® Club: Get your 6th cup free ∙ 1L Water Club: Get your 7th bottle free ∙ Fountain Club: Get your 6th fountain drink free ∙ Hot Food Club: Get your 9th hot food item free Simply enter your account phone number at participating locations to earn a digital card punch. Mobile Pay Made Simple Pay quickly and conveniently with your phone. ∙ Link an accepted payment method to your Account ∙ Reserve your pump and pay for fuel directly from the app ∙ Use Pay Inside at participating locations ∙ Access digital receipts in the app anytime More Convenience at Your Fingertips ∙ Find nearby locations and filter by amenities such as Restrooms, Full-Service Car Wash, Amazon Pickup, EV Charging, and more. ∙ Get answers to common questions with Mobi, our virtual agent.
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
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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.
