App Overview

American Mahjong Trainer icon

American Mahjong Trainer

Kristin Richter · Education

American Mahjong can feel like a lot when you’re just getting started.

$4.99 · In-app purchases

PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
5.0
1 ratings · Top 5%

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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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.

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.

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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> SELECT BUILD PLATFORM:

Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

// RORK SYSTEM PROMPT
Rork plan preview for American Mahjong Trainer: map the core Education 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 clear progress tracking system with visuals and reminders.

Assumption to check: Users may find it hard to keep track of their learning progress

Validate with people who use this workflow before building.

Hypothesis 2

Introduce more engaging practice modes and gamification elements.

Assumption to check: Limited interactive practice options may lead to user disengagement

Validate with people who use this workflow before building.

Hypothesis 3

Create features for user forums or chat to enhance community engagement.

Assumption to check: Lack of community features for discussion and support

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

American Mahjong can feel like a lot when you’re just getting started. There are tiles to recognize, patterns to understand, groupings to remember, and table language that experienced players seem to know without even thinking. American Mahjong Trainer was built to make that learning curve feel calmer, clearer, and much more approachable. This app helps new and returning players build confidence before they sit down at a real mahjong table. Instead of dropping you straight into full gameplay, American Mahjong Trainer gives you a friendly place to learn the foundation: what the tiles mean, how the game is structured, how hands are built, and how to start recognizing the pieces that make American Mahjong easier to understand. Learn at your own pace with simple lessons, visual explanations, and interactive study tools designed for real comprehension. What you can practice: • Tile recognition across suits, winds, dragons, flowers, and jokers • Basic American Mahjong structure and terminology • Tile groupings like pairs, pungs, kongs, quints, and singles • How the game flows from setup to winning • Pattern-reading basics to help you understand how hands are organized • Flashcards that make study feel simple and repeatable American Mahjong Trainer is especially helpful if you: • Are brand new to American Mahjong • Feel nervous joining a real table • Took a class but still want more practice • Want to study tiles and terms between games • Learn best with visuals, repetition, and simple explanations • Want a calmer way to build confidence before playing with others This is not a fast, noisy game app. It is a gentle study companion for people who want to actually understand what they’re looking at. Whether you’re learning for a weekly game, preparing for your first lesson, or trying to feel less lost at the table, American Mahjong Trainer gives you a supportive place to begin. Learn the tiles. Understand the structure. Build confidence in your gameplay.

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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-native-reanimated
expo-router
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.