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
Sudoku! For Watch
Important Note: This app can only be downloaded from the App Store on Apple Watch
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 included15 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 Sudoku! For Watch: 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
Incorporate features like hints, undo options, and multiple difficulty levels.
Assumption to check: Limited gameplay features compared to full Sudoku apps
Validate with people who use this workflow before building.
Hypothesis 2
Add achievements, daily challenges, and leaderboards to enhance user engagement.
Assumption to check: Lack of user engagement and motivation
Validate with people who use this workflow before building.
Hypothesis 3
Implement a tutorial mode to guide users through the first puzzle.
Assumption to check: Poor onboarding experience for new users
Validate with people who use this workflow before building.
Hypothesis 4
Allow users to choose themes, colors, and fonts for a personalized experience.
Assumption to check: No customization options for appearance
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
Important Note: This app can only be downloaded from the App Store on Apple Watch. Here's how: 1. Press the Digital Crown on your watch to open the app list 2. Find and open the App Store 3. Scroll to the bottom and tap [Account] 4. Find [Purchased] to download the app Watch Sudoku is a lightweight Sudoku game specially designed for Apple Watch, allowing you to enjoy puzzle-solving anytime, anywhere. Playing Sudoku on your watch is not only convenient but also helps exercise your brain and improve logical thinking during your spare time. 【Features】 • 6x6 Sudoku gameplay optimized for Apple Watch • Three difficulty levels: Easy, Medium, Hard • Clean interface design with intuitive controls • Real-time error checking • Timer system and best time records • Completely free, no ads 【Game Rules】 • Fill numbers 1-6 in each row without repetition • Fill numbers 1-6 in each column without repetition • Fill numbers 1-6 in each 2x3 box without repetition 【FAQ】 Q: Can't find the app in the iPhone App Store? A: This is a pure Apple Watch app. Please follow the "Important Note" steps above to download it directly on your watch. Q: Where can I find the app after purchase? A: On your Apple Watch: Open App Store → Scroll to bottom → Tap [Account] → Find [Purchased] → Download the app. Q: Why 6x6 instead of traditional 9x9? A: The 6x6 layout is specially optimized for the Apple Watch's small screen to ensure the best gaming experience and ease of operation. Q: How do I start a new game? A: Tap "Start Game" on the main screen and select your preferred difficulty level. Q: How do I input numbers? A: Tap on an empty cell, then select a number from 1-6 in the number picker. Please note that numbers cannot be deleted or modified once entered. Q: Which Apple Watch models are supported? A: All Apple Watch models running watchOS 9.0 or later are supported. Q: What if I enter a wrong number? A: The game will show error indicators. If you make a mistake, we recommend starting a new game - it's a good opportunity to practice! Q: Will the game data sync with my iPhone? A: This is a pure Watch app, all data is stored locally on your watch with no syncing required. Whether you're a Sudoku beginner or expert, you'll find the right challenge level in this game. Experience this carefully designed Sudoku game now! Download and play, turn your Apple Watch into a portable Sudoku space!
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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
React Navigation
Async Storage
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BUILD KIT DIFFICULTY
Intermediate
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.
