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
BKFC+
Welcome to the world of Bare Knuckle Fighting Championship — the
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.2
5 ratings · Top 30%
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 included16 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 BKFC+: 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
Offer more free previews or highlights to attract users.
Assumption to check: Limited access to live events for non-subscribers
Validate with people who use this workflow before building.
Hypothesis 2
Implement advanced filtering and sorting options for events.
Assumption to check: Search functionality can be cumbersome
Validate with people who use this workflow before building.
Hypothesis 3
Introduce AI-driven recommendations based on user preferences.
Assumption to check: Lack of personalized content recommendations
Validate with people who use this workflow before building.
Hypothesis 4
Focus on optimizing streaming performance and quality control.
Assumption to check: Inconsistent video streaming quality
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
Welcome to the world of Bare Knuckle Fighting Championship — the fastest-growing combat sport on Earth. BKFC+ brings every punch to your screen, live and on demand. Stream live monthly BKFC events from around the globe, including the legendary Knucklemania, then dive into a 200+ hour library of full fights, original series, and exclusive content. WHAT YOU GET WITH BKFC+ • Live monthly BKFC events streamed worldwide, including Knucklemania • 200+ hours of on-demand fights, full events & original series • Select FREE full fights and original content — no subscription required • Searchable fighter profiles, official rankings & deep fight stats • BKFC news, articles & special announcements • Live weigh-ins, press conferences, fighter interviews & podcasts • Access to live event tickets, exclusive offers & official merchandise • Bare knuckle action from the US and around the world THE REAL FIGHT BKFC is the first promotion in the U.S. since 1889 to hold legal, regulated bare knuckle events. No gloves. No hiding. Just the purest test of striking in combat sports. SUBSCRIBE YOUR WAY Subscribe monthly or save with an annual plan. Watch on your iPhone, iPad and Apple TV. Cancel anytime — no cancellation fees. Download BKFC+ free and step into the squared circle.
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
Supabase
React Navigation
Axios
React Native Reanimated
BUILD KIT DIFFICULTY
Advanced
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.
