App Overview

Roy Harris BJJ Over 40 icon

Roy Harris BJJ Over 40

Harris International · Sports

Belt Level: Low-white to low-purple.

$19.99 · In-app purchases

PRICE
$19.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
5.0
4 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 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.

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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Rork plan preview for Roy Harris BJJ Over 40: 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

Include more advanced techniques and drills.

Assumption to check: Limited variety of techniques for advanced practitioners.

Validate with people who use this workflow before building.

Hypothesis 2

Implement forums and chat for user interaction.

Assumption to check: Lack of community engagement features.

Validate with people who use this workflow before building.

Hypothesis 3

Offer more flexible pricing options or additional value.

Assumption to check: High subscription price compared to competitors.

Validate with people who use this workflow before building.

Hypothesis 4

Allow users to download videos for offline viewing.

Assumption to check: No offline access to videos.

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

Belt Level: Low-white to low-purple. Emphasis: Safer training, less injuries and more fun for the more mature Jiu Jitsu Practitioners! While there certainly are a ton of instructionals out there for tournament competitors, the Brazilian Jiu Jitsu Over 40 instructional app breaks new ground by focusing on the needs of practitioners who are close to or over the age of forty, have the responsibilities of family and career waiting for them immediately following class and have major concerns regarding the frequency and severity of injuries while sparring. For many of these practitioners, Jiu Jitsu is simply a fun hobby used to help them stay in shape, relieve stress, keep their mind sharp, make friends and have fun! The Brazilian Jiu Jitsu Over 40 instructional app will help these “mature practitioners” lower the frequency and severity of injuries associated with grappling with other practitioners who are ten to twenty years younger than themselves. It will also help them to accomplish their goals through minimized and well timed movements. Seven areas are addressed on this instructional: I. Introduction and theory II. Fundamental movements III. Defensive postures IV. Defensive positioning V. Fundamental techniques VI. Submission escapes VII. How to train The fundamental movements section focuses on the most important movements within Brazilian Jiu Jitsu. I stress the importance of “Fundamental Movements” because they lay the foundation of the art. When I write the words “Fundamental Movements”, I am referring to a specific group of movements that are used most often by middle to high level practitioners. For example, horizontal and vertical hip movements are the foundation for any grappling method. The defensive postures section is designed to be combined with the defensive positioning and fundamental techniques sections. The combination of these three sections will not only lower the frequency and severity of injuries, but they will also lower the amount of energy the “Over 40 practitioner” will put into his or her overall game! The defensive postures will show you how and where to place your arms into a position that will make it hard for your opponent to gain any leverage over your arm or neck without taking his or her weight off of your body. Defensive positioning will show you how to position your body in such a way as to get the opponent to move in a predictable manner (e.g. forcing him to take his weight off of you so that it will be physically easier for you to escape). Finally, the defensive postures and positioning, when combined with the ten (10) fundamental techniques taught on this instructional, will lower the amount of force you use to accomplish your objectives. Lowering the amount of energy used to accomplish a specific objective should be the eventual goal for every Over 40 practitioner! The next section is an important one: Submission escapes. However, I don’t want you (the more mature practitioner) to miss the main point of this section: My goal in presenting this information was not just so you could tap less often. Rather, the goal was to help you to lower the frequency of injuries associated with sparring with the young and the aggressive students at your academy. Finally, in the last chapter of the instructional app, I show you how to train. I teach a few methods of combining the movements, techniques, training methods and strategies mentioned in this instructional into something that will not only lower the frequency and severity of injuries, but will also lower the amount of energy you expend to accomplish your objectives and show you how to get more enjoyment out of your Jiu Jitsu training!

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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
Expo AV
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.