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
Japanese Walk 3x3
Stop just walking and start training for better health! Discover the scientifically-backed Japanese Walk 3x3 method, a simple yet powerful interval walking routine proven to boost fitness and improve blood sugar control.
$5.99 · In-app purchases
PRICE
$5.99
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
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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 Japanese Walk 3x3: map the core Health & Fitness 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 seamless integration with major health platforms.
Assumption to check: Limited integration with health platforms like HealthKit or Google Fit
Validate with people who use this workflow before building.
Hypothesis 2
Add social sharing and challenges to engage users.
Assumption to check: Lack of social features for motivation
Validate with people who use this workflow before building.
Hypothesis 3
Provide detailed analytics on user walking habits and achievements.
Assumption to check: Insufficient analytics on walking trends
Validate with people who use this workflow before building.
Hypothesis 4
Incorporate gamification elements such as achievements and rewards for milestones.
Assumption to check: No gamification elements
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
Stop just walking and start training for better health! Discover the scientifically-backed Japanese Walk 3x3 method, a simple yet powerful interval walking routine proven to boost fitness and improve blood sugar control. This app is your official guide, making it easy to schedule your 3x3 sessions and track your progress, whether you're at home or on the go. Start your journey to a healthier you today! WHAT IS THE JAPANESE WALK 3X3? The 3x3 method involves alternating 3 minutes of fast walking with 3 minutes of slow walking—repeatedly. Research shows that this routine, performed regularly for 30 minutes, significantly increases strength, endurance, and overall well-being. KEY FEATURES DESIGNED FOR YOUR SUCCESS OFFICIAL 3X3 PROTOCOL: Built-in guidance for the recommended 5 cycles (approx. 30 minutes) or your choice of a shorter or longer session. INDOOR & OUTDOOR MODES: Seamlessly switch between modes. Use the Outdoor mode with GPS tracking to map your routes, or select Indoor mode for treadmill use. CRYSTAL CLEAR AUDIO CUES: Stay focused with clear voice guidance telling you exactly when to start your fast walk and when to recover. SIMPLE, FOCUSED INTERFACE: No complicated menus. Just select your time, mode, and press start. We keep it simple so you can focus on walking. PERSONAL PROGRESS TRACKING: Monitor your session history, total time, and cycles completed to see your fitness journey unfold. WHY CHOOSE THIS APP? The Japanese Walk is one of the most accessible and effective forms of interval training. It's high-impact on your health, but low-impact on your joints. Whether you're a beginner looking to establish a walking habit or an experienced walker aiming to boost your routine, this app provides the structure and motivation you need.
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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
Victory Native
React Navigation
@react-native-async-storage/async-storage
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.
