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
Spark Driver
With the Spark Driver™ app, you can deliver orders, or shop and deliver orders, for Walmart and other businesses
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
300,421 ratings · Top 15%
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 included16 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 Spark Driver: map the core Business 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 better geolocation features to show more opportunities.
Assumption to check: Limited delivery opportunities based on location
Validate with people who use this workflow before building.
Hypothesis 2
Add push notifications for delivery updates.
Assumption to check: Lack of real-time updates on delivery status
Validate with people who use this workflow before building.
Hypothesis 3
Simplify earnings tracking with better visual summaries.
Assumption to check: Complex earnings tracking
Validate with people who use this workflow before building.
Hypothesis 4
Create a more user-friendly profile edit experience.
Assumption to check: Difficult profile management
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
With the Spark Driver™ app, you can deliver orders, or shop and deliver orders, for Walmart and other businesses. All you need is a car, a smartphone, and insurance. After you’ve completed the enrollment process (including a background check), you will be notified when your local zone has availability. You’ll then receive details for accessing the Spark Driver app. BE YOUR OWN BOSS As an independent contractor, you’ll enjoy the flexibility of working around your own schedule. You can shop and deliver, or only deliver, as little or as often as you like. EARN MONEY Making money is easy because you earn each time you complete a shopping or delivery order. Plus, you always keep 100% of confirmed customer tips. Incentive programs and referral offers give you the opportunity to earn even more! EASY TO USE After you’ve accepted a trip, the app helps you every step of the way — from navigating to the store, to helping you find items in your shopping trip, to delivering to a customer’s location. For more information about the Spark Driver app, you can visit www.drive4spark.walmart.com.
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.
