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
grapl app
grapl helps grapplers turn mat time into measurable progress by giving them tools to train with purpose, track performance, and continuously improve
$9.99 · In-app purchases
PRICE
$9.99
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.
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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 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 grapl app: 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
Focus on unique workout and nutrition tracking features.
Assumption to check: Limited features compared to leading fitness apps
Validate with people who use this workflow before building.
Hypothesis 2
Add social challenges and community features.
Assumption to check: User engagement may drop due to lack of social features
Validate with people who use this workflow before building.
Hypothesis 3
Provide a guided setup and tips for new users.
Assumption to check: Poor onboarding experience
Validate with people who use this workflow before building.
Hypothesis 4
Ensure reliable data synchronization with cloud storage.
Assumption to check: Inconsistent data syncing across devices
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
grapl helps grapplers turn mat time into measurable progress by giving them tools to train with purpose, track performance, and continuously improve. Build a personalized curriculum with your techniques and videos, log rolls and competitions to identify patterns, and set structured goals with clear milestones to stay consistent. Grapl offers both free and premium features. Users can access the AI Grappling Coach with up to 10 free prompts, while advanced capabilities such as AI Gap Analysis, unlimited uploads, and unlimited AI coaching are available with a Grapl Pro subscription. With a built-in AI coach, grapl helps analyze your training and highlight gaps in your game, offering practical suggestions to improve. Free users receive up to 10 AI coaching prompts, while unlimited AI coaching and deeper analysis tools are available with a Grapl Pro subscription. Explore a growing technique library and integrate new techniques directly into your training plan so you’re always evolving. Whether you’re a beginner or a seasoned competitor, grapl gives you clarity, structure, and insight so every session on the mat moves you forward. FREE VS PRO FEATURES Free: * Up to 10 AI coaching prompts * Up to 10 curriculum technique cards with video uploads * Up to 10 roll log entries with video uploads * Up to 10 shared technique cards * 1 curriculum template (BJJ Survival) * Unlimited objective cards Grapl Pro (subscription required): * Unlimited AI coaching prompts * AI Gap Analysis (subscription required) * Unlimited curriculum technique cards and video uploads * Unlimited roll log entries and video uploads * Unlimited sharing of technique cards * Additional curriculum templates (including Blue Belt Starter Kit) SUBSCRIPTION INFORMATION Grapl offers an optional auto-renewable subscription (Grapl Pro) that unlocks premium features listed above. Payment will be charged to your Apple ID account at confirmation of purchase. Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. Terms of Service: https://www.grapl.app/terms-of-service Privacy Policy: https://www.grapl.app/privacy-policy
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
SQLite
React Navigation
Axios
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.
