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 Master Path to Harmony
Find your Zen with Mahjong Master: Path to Harmony
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 1.5
2 ratings · Below Average
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 included16 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 Master Path to Harmony: map the core Games 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
Add unique themed levels and challenges.
Assumption to check: Users find the levels repetitive and lacking variety.
Validate with people who use this workflow before building.
Hypothesis 2
Provide clearer explanations and value for in-app purchases.
Assumption to check: In-app purchases can be confusing or feel forced.
Validate with people who use this workflow before building.
Hypothesis 3
Optimize game assets and loading processes to improve speed.
Assumption to check: Performance issues with loading times and lag during gameplay.
Validate with people who use this workflow before building.
Hypothesis 4
Implement a more rewarding achievement system to boost engagement.
Assumption to check: Low user engagement due to minimal 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
Find your Zen with Mahjong Master: Path to Harmony Step into a peaceful Mahjong journey where strategy meets relaxation. Match beautiful tiles, clear the board, and progress through thousands of handcrafted levels in a tranquil world inspired by traditional Mahjong. Whether you want a quick brain break or a longer relaxing session, Mahjong Master offers the perfect puzzle experience. Features Classic Mahjong Gameplay Match identical tiles and clear the board. Thousands of Challenging Levels Progress along the path to harmony through an ever-growing collection of puzzles. Test Your Focus Race against the clock and challenge your concentration skills. Relaxing Zen Experience Enjoy soothing visuals and calming environments designed for relaxation. Charming World Map Travel through beautiful locations and unlock new stages along your Mahjong journey. Helpful Boosters Use hints and time bonuses to overcome tricky boards. Daily Brain Training Play daily and keep your mind sharp with engaging tile puzzles. Why You'll Love Mahjong Master • Easy to learn, challenging to master • Perfect for short breaks or long relaxing sessions • Beautiful Mahjong tiles and smooth gameplay • Great for fans of puzzle, matching, and brain games Take a deep breath, clear the tiles, and follow the Path to Harmony. Download Mahjong Master: Path to Harmony today.
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/supabase-js
react-navigation
react-native-reanimated
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.
