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
CA Lottery Official App
Welcome to the California Lottery Official App, where you can follow the Lottery in the palm of your hand - anytime, anywhere
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
181,197 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 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 CA Lottery Official App: map the core Entertainment 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 a more streamlined game selection process with a favorites feature.
Assumption to check: Users often find it challenging to navigate through multiple lottery games.
Validate with people who use this workflow before building.
Hypothesis 2
Enhance real-time updates and notifications for users.
Assumption to check: Inconsistent updates for lottery results.
Validate with people who use this workflow before building.
Hypothesis 3
Add features for managing multiple lottery tickets and viewing transaction history.
Assumption to check: Limited account management features.
Validate with people who use this workflow before building.
Hypothesis 4
Provide an ad-free subscription option for a better user experience.
Assumption to check: Ads can be intrusive during usage.
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
Welcome to the California Lottery Official App, where you can follow the Lottery in the palm of your hand - anytime, anywhere. Download the app today to personalize your experience by choosing your favorite ways to play! Cool features include: • See If You’re A Winner - Check-A-Ticket allows you to see if you won Powerball, Mega Millions, SuperLotto Plus, Fantasy 5, Hot Spot and all Daily games! • Never Miss A Game - Stay in the loop when jackpots are high and new Scratchers are out! • Customized Push Notifications – Be the first to know with jackpot and draw games notifications straight to your mobile device. • Winning Numbers - Get customized notifications of current jackpot and draw game results. • 2nd Chance Drawings – Find special promotions, enter non-winning Scratchers, SuperLotto Plus, and Fantasy 5 tickets into bonus draws, and track your submissions. • Find Where To Play – Use the interactive map of retailers to plan your purchase, including Lucky Retailers and Hot Spot play locations near you. • Find Prize Claim Information including hours, locations and prize claiming options. • All Things Lottery - Opt-in for the latest news, product updates, and 2nd Chance promotions. The California Lottery provides supplemental funding for California public schools. Please play responsibly. You must 18 or older to purchase, play or claim. Disclaimer: Although every effort is made to ensure the accuracy of the winning number information in the California Lottery Official App, mistakes can occur. Please be sure to refresh your screen and look for the draw date when viewing winning numbers. In the event of any discrepancies, California state law and California Lottery regulations prevail. Complete game information and prize claiming instructions are available at www.calottery.com and all California Lottery Retailers.
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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
Supabase
Zustand
React Navigation
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.
