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
Capital One Shopping: Save Now
100% free for everyone – no Capital One bank or credit card account required! Get free automatic coupons and exclusive savings on the go.
Free · In-app purchases
OVERALL US RANK
#80
Free · all categories
REVENUE (Est)
$123K/mo
$68K - $178K
RATING
★ 4.9
1,677,489 ratings · Top 5%
Evidence scope: #80 is the current overall US Free chart position. 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 included19 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.
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 Capital One Shopping: Save Now: map the core Shopping 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
Optimize loading times with caching and pre-fetching.
Assumption to check: App can be slow to load deals.
Validate with people who use this workflow before building.
Hypothesis 2
Enhance filtering capabilities for better user experience.
Assumption to check: Limited filtering options for deals.
Validate with people who use this workflow before building.
Hypothesis 3
Introduce better organization features for wishlist management.
Assumption to check: Wishlist can be cluttered with too many items.
Validate with people who use this workflow before building.
Hypothesis 4
Simplify checkout steps to improve clarity and speed.
Assumption to check: Checkout process can be confusing.
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
100% free for everyone – no Capital One bank or credit card account required! Get free automatic coupons and exclusive savings on the go. Bonus will be awarded as Capital One Shopping Rewards. Rewards will be issued within 30 days of completing all sign up bonus requirements but may take longer in some cases. Additional terms apply. AUTOMATICALLY APPLY COUPONS - The free tool works in the background to find coupons and promo codes - It then automatically applies coupons and promo codes at checkout EARN FREE SHOPPING REWARDS - Earn rewards when you shop at your favorite stores - Redeem rewards for gift cards! COMPARE PRICES - The app looks for a better price on the items you are searching for - Includes shipping and handling when finding a better deal GET NOTIFIED OF PRICE DROPS - You'll be notified when items you want go on sale or are found elsewhere for less SAVE IN SAFARI - Save on the Web, too! - Add to Safari and get free automatic coupons and rewards Over 10 million people globally save with Capital One Shopping! Join this exclusive club today for free!
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
React Native
Expo
Zustand
axios
react-navigation
@react-native-reanimated
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.
