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
Mahjong Majong For Watch
Note: This app is only compatible with watchOS.
$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.
Build your own version
Build Kit
Make this idea yours
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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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/
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 Mahjong Majong 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
Introduce more game modes and customization options.
Assumption to check: Limited game modes and variety
Validate with people who use this workflow before building.
Hypothesis 2
Add multiplayer features or social sharing.
Assumption to check: No social features or multiplayer options
Validate with people who use this workflow before building.
Hypothesis 3
Implement a guided tutorial for new users.
Assumption to check: Poor onboarding experience
Validate with people who use this workflow before building.
Hypothesis 4
Incorporate a rewards system for achievements.
Assumption to check: Lack of engagement and rewards
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
Note: This app is only compatible with watchOS. A perfect blend of classic mahjong and innovative puzzle-solving, a casual brain-teaser designed exclusively for smartwatches. Unique Gameplay, Fingertip Challenge Traditional mahjong tiles fall randomly in each level. Tap to collect them into the slot—three identical tiles automatically eliminate, freeing up space and accumulating points. The slot has limited capacity; failing to clear it before it fills means game over. Complete the target elimination within the countdown to test your strategic planning and reflexes! Time-Limited Stages, Fast-Paced Thrills Carefully crafted levels with escalating difficulty: from basic "dots, bamboo, and characters" combinations to chain eliminations of special tile sets. Each stage requires flexible strategies. Time constraints and random tile sequences keep the tension high, letting you enjoy challenges during commutes, breaks, or any spare moment. Watch-Optimized for Effortless Play • Minimalist Interaction: Touch controls tailored for watch screens—single-finger operations, no complex gestures needed. • Seamless Pausing: Supports background suspension, allowing you to pause and resume anytime, making the most of fragmented time. Download Now and Unleash a New Mahjong Puzzle Experience Conquer levels with wit and speed, challenge global leaderboards, and unlock stunning tile designs! A perfect fusion of tradition and innovation, this is the ultimate test of focus and decision-making. Are you ready to become a mahjong puzzle master?
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
Supabase
React Navigation
React Native Gesture Handler
React Native Reanimated
BUILD KIT DIFFICULTY
Starter
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.
