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
Adrian James: 6 Pack Abs
Adrian James 6 Pack Abs Workout has become an international sensation
$3.99 · In-app purchases
PRICE
$3.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.9
347 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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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/
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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 Adrian James: 6 Pack Abs: 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
Include user-generated workouts and custom routines.
Assumption to check: Limited variety of workouts
Validate with people who use this workflow before building.
Hypothesis 2
Add social challenges and leaderboards.
Assumption to check: No social features
Validate with people who use this workflow before building.
Hypothesis 3
Integrate a comprehensive meal planner and recipes.
Assumption to check: Inadequate nutrition tracking
Validate with people who use this workflow before building.
Hypothesis 4
Introduce gamification elements like achievements and rewards.
Assumption to check: Lack of progress motivation
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
Adrian James 6 Pack Abs Workout has become an international sensation. Download the chart-topping app to transform your body and gain a newfound lust for life. With over one million downloads, and popularised by celebs and sports stars, the Adrian James 6 Pack Abs Workout is the ultimate abdominal routine. You can exercise anytime, anywhere - no equipment and no internet connection required. Number one in over 50 countries, Adrian James 6 Pack Abs Workout provides clear video tutorials with an easy-to-follow workout mode to challenge every ability level. Get motivated with the 8-week challenge and earn points for every workout you complete. Where would you like to be 8 weeks from now? If the answer is "In the best shape of my life", download the app and start today. It’s your body. Take control. App features include: • 18 graded exercises to challenge every ability • Clear video tutorials with audio commentary • Helpful tips to guide you through each exercise • Workout mode with randomised levels • Motivational quotes to spur you on • Adrian James 8-week challenge • Absolutely no gym equipment required Also available: • Adrian James Bootcamp • Adrian James High Intensity Interval Training
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
react-native-reanimated
expo-linear-gradient
axios
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.
