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
Cart AI: Track Grocery Budget
CART AI: STOP OVERSPENDING AT CHECKOUT
$2.99
PRICE
$2.99
No in-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.5
141 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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Combine features and design from your favorite apps.
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What's included
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 Cart AI: Track Grocery Budget: map the core Finance 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 automatic transaction categorization based on item names.
Assumption to check: Users often find it hard to categorize transactions accurately.
Validate with people who use this workflow before building.
Hypothesis 2
Add customizable notifications for budget limits.
Assumption to check: Budget tracking can be tedious without reminders.
Validate with people who use this workflow before building.
Hypothesis 3
Include analytics features showing spending trends.
Assumption to check: Users want better insights into spending habits.
Validate with people who use this workflow before building.
Hypothesis 4
Allow users to share their grocery lists with family or friends.
Assumption to check: The app lacks social sharing features.
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
CART AI: STOP OVERSPENDING AT CHECKOUT Do you lose track of your cart total and overspend at checkout? Cart AI is a shopping budget tracker and grocery spending companion that helps you track your cart total in real time, stay under budget, and avoid surprises at the register. Scan prices, monitor your spending, and build smarter shopping habits. SHOP WITH A LIVE CART TOTAL • Set a budget for every shopping trip. • Scan price tags or enter prices manually. • Watch your cart total update instantly. • Get alerts before going over budget. QUICK CART TOTAL • Need a fast total without setting a budget? • Add prices in seconds and instantly see how much is in your cart. • Perfect for grocery shopping, mall trips, and everyday purchases. SCAN FASTER WITH MULTI-SHOT MODE • Scan multiple price tags without stopping. • Add items continuously while shopping. • Review everything at once after scanning. STAY UNDER BUDGET WITH AI Went over budget? Cart AI can suggest items to remove or adjust to help bring your cart back within budget. No manual math required. SMART SHOPPING LISTS • Create reusable shopping lists. • Estimate costs before leaving home. • Save favorite items in your personal item bank. • Track price history to spot increases. • Turn lists into active shopping trips with one tap. SPENDING INSIGHTS • View monthly spending and savings trends. • See category breakdowns and your most-bought items. • Review previous shopping trips. • Track savings goals and understand your shopping habits over time. ACHIEVEMENTS & GOALS • Earn badges for staying under budget. • Set monthly savings goals. • Build better shopping habits over time. SHARE YOUR PROGRESS Share trip summaries, shopping lists, achievements, and insights using beautifully designed cards. Perfect for sharing with family, friends, or on social media. SHOP ANYWHERE • Works with or without Wi-Fi. • Supports 100+ currencies. • Travel Mode automatically converts prices to your home currency. • Great for grocery shopping, travel shopping, and everyday purchases. • Available in English, Spanish, French, German, Portuguese, Italian, Swedish, Japanese, Korean, and Simplified Chinese. WHY CART AI? Cart AI is a grocery budget tracker, shopping list app, and spending tracker built for people who want to stay under budget without managing their entire financial life. Whether you're shopping for groceries, home supplies, travel essentials, or everyday purchases, Cart AI helps you know your total before checkout and spend with more confidence. PAY ONCE. NO SUBSCRIPTION. Cart AI is available as a one-time purchase. Pay once and get access to the app without a recurring subscription. Cart AI does not track your full financial history. It is designed specifically to help you track your cart total, avoid overspending, and manage your shopping budget more easily. TERMS: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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
react-navigation
zustand
expo-sqlite
react-native-paper
BUILD KIT DIFFICULTY
Not assessed in a Build Kit yet.
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.
