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
Purple Belt Requirements 2.0
Introducing BJJ Purple Belt Requirements 2.0 by Roy Dean, your ultimate companion on the path to Brazilian Jiu Jitsu mastery! This stunning app brings you an unparalleled learning experience, designed to help you achi...
$99.99 · In-app purchases
PRICE
$99.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.9
10 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.
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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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/
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 Purple Belt Requirements 2.0: 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
Allow users to add custom requirements and tasks.
Assumption to check: Limited customization options for requirements.
Validate with people who use this workflow before building.
Hypothesis 2
Provide clearer instructions and benefits of premium features.
Assumption to check: In-app purchase process is unclear.
Validate with people who use this workflow before building.
Hypothesis 3
Integrate forums or chat options for users to connect.
Assumption to check: Lack of community features for users.
Validate with people who use this workflow before building.
Hypothesis 4
Enable users to share their progress on social media.
Assumption to check: No progress sharing options.
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
Introducing BJJ Purple Belt Requirements 2.0 by Roy Dean, your ultimate companion on the path to Brazilian Jiu Jitsu mastery! This stunning app brings you an unparalleled learning experience, designed to help you achieve the esteemed purple belt status with ease and confidence. Join thousands of practitioners worldwide who have already elevated their skills and knowledge with Roy Dean's acclaimed teachings. Features: Comprehensive Curriculum: Dive into a meticulously crafted curriculum that covers all essential techniques, strategies, and principles required to earn your purple belt. From fundamental positions to advanced transitions, this app has it all. High-Quality Instructional Videos: Watch 24 high-definition instructional videos led by the renowned Roy Dean himself. His clear and concise teaching style ensures that you grasp each technique with precision, making complex moves accessible to practitioners of all levels. Step-by-Step Progression: Follow a well-structured learning path that gradually builds your proficiency. Each combination is presented in a step-by-step format, allowing you to fully understand the mechanics and details necessary for successful execution. Conceptual Guidance: Move beyond individual techniques, and learn how to bundle them together into effective sequences, regardless of your size. Gain insight into why techniques are chosen in specific situations, based on the experience of a 4th degree black belt. Offline Access: Enjoy uninterrupted learning, even when you're offline. Download videos in advance, allowing you to access the content anytime, anywhere, without an internet connection. Bjj Purple Belt Requirements 2.0 by Roy Dean is the ultimate digital companion for BJJ enthusiasts of all levels. Whether you're a beginner looking to establish a solid foundation or an experienced practitioner seeking to refine your techniques, this app is your pathway to purple belt excellence. Download now and embark on your journey to mastery!
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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 Navigation
TypeScript
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.
