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
IronMat
IronMat is the training companion built specifically for Brazilian Jiu-Jitsu athletes
$4.99 · In-app purchases
PRICE
$4.99
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
Make this idea yours
A product spec, screen plans, and build steps for your coding agent.
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Combine features and design from your favorite apps.
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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 IronMat: 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
Our clone can focus on a simplified, user-friendly interface.
Assumption to check: Users often find workout tracking apps overwhelming with too many features.
Validate with people who use this workflow before building.
Hypothesis 2
Incorporate social features and challenges to boost motivation.
Assumption to check: Many apps lack effective motivational features or community engagement.
Validate with people who use this workflow before building.
Hypothesis 3
Implement a comprehensive food database and barcode scanning for ease.
Assumption to check: Users report difficulty in logging meals accurately.
Validate with people who use this workflow before building.
Hypothesis 4
Optimize app performance for fast load and smooth transitions.
Assumption to check: Apps often have poor performance and slow load times.
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
IronMat is the training companion built specifically for Brazilian Jiu-Jitsu athletes. Whether you're a white belt just starting out or a seasoned competitor, IronMat helps you track every roll, measure your progress, and level up your game. TRACK YOUR TRAINING Log every session with session type (gi, no-gi, open mat, competition), duration, gym, instructor, techniques learned, and how you felt. Add photos and videos to capture highlights and study your game. SUBMISSIONS SCOREBOARD Track how many times you tapped out and how many submissions you landed — because knowing your numbers is the first step to improving them. STATS & STREAKS See your total mat time, monthly sessions, training streaks, and weekly activity charts at a glance. Set monthly goals for sessions or mat hours and watch your progress in real time. LEVEL UP WITH XP Earn XP every time you train. Level up through belt ranks, unlock badges for milestones like your first session, perfect training weeks, belt promotions, and more. Celebrate every achievement. TECHNIQUE LIBRARY Build your personal game plan. Save techniques by category — guard, passing, takedowns, submissions, escapes — with notes and video links so you never forget what you learned. CLASS SCHEDULE Add your gym's class schedule so you always know what's on today. Set reminders so you never miss a class. Share your schedule or import one from a teammate. AUTO GYM DETECTION Add your gym's location and IronMat will send you a reminder to log your session the moment you arrive — even if the app is closed. Add multiple gyms if you train at more than one spot. TRAINING GOALS Set monthly targets for session count or mat hours. Track your progress through the month and stay accountable to your training plan. BADGES & BELT PROMOTIONS Earn badges for hitting milestones: first session, 10/50/100 sessions, streaks, submissions, mat time, and more. Get a special badge every time you earn a belt promotion. STREAK FREEZE Life happens. Use your monthly streak freeze to protect your hard-earned streak when you need a day off. TRAINING CALENDAR See your entire training history in a calendar view. Spot patterns, identify gaps, and stay consistent. IronMat Pro is $4.99/month. Cancel anytime from your iPhone Settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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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
Redux
React Navigation
Axios
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.
