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
Wing Chun Master Class
This app is a must for all Wing Chun enthusiasts as it utilises some 400 tutorial training videos from beginner to advanced levels
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.4
5 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 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 Wing Chun Master Class: map the core Sports 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
Provide more diverse training resources and classes for users.
Assumption to check: Limited class variety and depth
Validate with people who use this workflow before building.
Hypothesis 2
Incorporate community features such as forums or chat.
Assumption to check: User engagement is low due to lack of community features
Validate with people who use this workflow before building.
Hypothesis 3
Implement a more intuitive class discovery system.
Assumption to check: Difficult navigation between classes
Validate with people who use this workflow before building.
Hypothesis 4
Ensure all videos meet a certain quality standard.
Assumption to check: Inconsistent video quality
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
This app is a must for all Wing Chun enthusiasts as it utilises some 400 tutorial training videos from beginner to advanced levels. Many training routines and workouts are explained and many techniques are demonstrated. Tutorial lessons include: Learn Wing Chun S1 EP1 - CREATE A SOLID STANCE Learn Wing Chun S1 EP2 - THE POWERFUL PUNCH Learn Wing Chun S1 EP3 - THE BEAUTY OF SIU LIM TAO 1 Learn Wing Chun S1 EP4 - THE BEAUTY OF SIU LIM TAO 2 Learn Wing Chun S1 EP5 - THE BEAUTY OF SIU LIM TAO 3 Learn Wing Chun - S1 EP6 MAKE YOUR HAND A ROCK Learn Wing Chun - S1 EP7 DETAILS ON SHIFTING Learn Wing Chun - S1 EP8 BABY STEPS TO FOOTWORK Learn Wing Chun - S1 EP9 FINISHING THE FOOTWORK Wing Chun - S1 Ep10 Kicks Wing Chun - S1 EP11 Day one of chi sao Wing Chun - S1 EP12 Day two of chi sao Wing Chun - S1 E13 Final beginner lesson on single sticky hands Wing Chun - S1 EP14 Hand techniques Wing Chun - S1 EP15 Double sticky hands basic Wing Chun - S1 Ep16 Attacks in double sticky hands Wing Chun - S1 Ep17 Chi sao attacks Wing Chun - S1 E18 Chi sao blocking Wing Chun - S1 EP19 More Double sticky hands blocking Wing Chun - S1 EP20 Closing the Gap Wing Chun - S1 EP21 Blocks with closing the gap Wing Chun - S1 EP22 Bong and Wu Blocks Learn Wing Chun - S1 EP23 PROPER WAY TO LOP Wing Chun - S1 EP 24 Finale PT 1 Wing Chun - S1 EP24 Finale PT 2 Wing chun for beginners lesson 1 basic leg exercise Wing chun for beginners lesson 2 basic leg exercise with twist Wing Chun for beginners lesson 3 basic leg exercisemoving forward with turn Wing Chun for beginner lesson 4 basic leg exercise moving forward changing sides Wing Chun beginners lesson 5 basic hand exercisechanging guard hands with twist Wing Chun for beginners lesson 6basic leg exercise static triple kick Wing Chun for beginners lesson 7 basic leg combination exercise moving forward with single kick Wing Chun for beginners lesson 8 basic hand exercisestatic straight punch Wing Chun for beginners lesson 9 basic hand exercisechanging guard hands with bong sau Wing Chun for beginners lesson 10 basic hand exercisestatic blocking Wing Chun for beginners lesson 11 basic hand exercise static triple punch Wing Chun Lesson for beginners 12 basic hand exercisestatic bong sau with chop Wing Chun for beginners lesson 13 basic leg hand combination moving forward with straight punch Wing Chun for beginner lesson 14 basic hand exercise block a straight punch on outside of the arm Wing Chun for beginners lesson 15 basic hand exercise blocking a straight punch on inside arm Wing Chun for beginners lesson 16 basic hand exercise blocking a hook Wing Chun for beginners lesson 17 basic hand exercise blocking an uppercut Wing Chun for beginners lesson 18 basic blocking combo drill blocking punch hook uppercut Wing Chun for beginners lessons 19 basic hand exercise static blocking for high kicks Wing Chun for beginners lesson 20 basic leg exercise blocking low kicks Wing Chun for beginners lesson 21 basic leg exercise blocking a side kick Wing Chun for beginners lesson 22 basic leg exercise blocking a round kick Wing Chun for beginners lesson 23 basic leg exercise blocking a front kick Wing Chun for beginners lesson 24 basic energy drill punch drill Wing Chun for beginners lesson 25 basic energy drill punch drill change from right to left Wing Chun for beginners lesson 26 basic energy drill lapsau Wing Chun for beginners lesson 27 basic hand combo block straight punch and counter with a punch Wing Chun for beginners lesson 28 combo blocking straight punch and counter with a stomp kick Wing Chun for beginners lesson 29 combo blocking a straight punch and countering with a side kick Wing Chun for beginners lesson 30 basic hand exercise blocking a round kick and grabbing the leg and many more!
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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
react-navigation
react-native-video
Zustand
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.
