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
Kubby: One App for Shopping
SHOP ANYWHERE, ALL IN ONE PLACE
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 5.0
17 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/
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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 Kubby: One App for Shopping: 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
Integrate more stores for diverse product selection.
Assumption to check: Limited product availability across stores
Validate with people who use this workflow before building.
Hypothesis 2
Implement a verified review system for authenticity.
Assumption to check: Inconsistent user reviews and ratings
Validate with people who use this workflow before building.
Hypothesis 3
Streamline the checkout with fewer steps and clearer instructions.
Assumption to check: Checkout process can be confusing
Validate with people who use this workflow before building.
Hypothesis 4
Add algorithmic suggestions based on user behavior.
Assumption to check: Lack of personalized recommendations
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
SHOP ANYWHERE, ALL IN ONE PLACE Your entire shopping life, finally in one place. Kubby connects online stores, local businesses, and every order into one seamless experience. Discover. Shop. Track. Without the chaos. WITH KUBBY, YOU CAN: - Shop across thousands of online stores in one place - Discover local businesses near you - Track every order with real-time updates across major carriers - Get AI-powered recommendations based on how you actually shop - See clear spending insights across all your purchases Shopping finally feels effortless. SMARTER SHOPPING WITH AI Kubby learns how you shop across stores, not just within one. It turns that into personalized recommendations, automatic purchase organization, and insights that help you make better decisions before and after you buy. SECURE LOCAL PICKUP (KUBBY SPACES) Package theft shouldn't be normal. Kubby Spaces are secure neighborhood pickup locations, giving you a safer and more flexible way to receive your orders. Currently available in select US cities, with more locations coming soon. PRIVACY-FIRST, AD-FREE We only use what's needed to track your orders and recommend relevant options nearby. No ads. No data selling. Just a cleaner shopping experience. BUILT FOR SUSTAINABILITY Reduce delivery miles, support local businesses, and make every order part of your community. The way we shop has changed. Kubby brings it all together. Subscription required for full access. Terms: https://www.kubby.io/terms Privacy: https://www.kubby.io/privacy
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
Supabase
React Navigation
react-native-reanimated
BUILD KIT DIFFICULTY
Expert
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.
