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
eFHUB 26
Unofficial Companion App
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.0
540 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 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.
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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for eFHUB 26: 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 sports categories and local events.
Assumption to check: Limited coverage of niche sports
Validate with people who use this workflow before building.
Hypothesis 2
Optimize content delivery and caching.
Assumption to check: Slow loading times for articles
Validate with people who use this workflow before building.
Hypothesis 3
Create a more cohesive design language.
Assumption to check: Inconsistent user interface
Validate with people who use this workflow before building.
Hypothesis 4
Integrate more sharing options and social media features.
Assumption to check: Limited social 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
Unofficial Companion App This app is not a game. It is a powerful companion tool designed for football game enthusiasts who want to get more from their experience. Packed with databases, calculators, tutorials, and build tools everything you need to plan your dream team. PLAYER DATABASE Explore a detailed player database with smart tools to help you find top talent and understand their strengths. View player stats at max level. See dribbling skills with controller animations. Understand how condition affects stats and ratings. Instantly spot top 6 key stats on every player card. Track player form throughout the season. MANAGER DATABASE Stay ahead with up-to-date manager formations and tactics. Find managers who have changed tactics weekly. Search based on offensive and defensive playstyles. Use the formation search tool to find your perfect setup. SQUAD BUILDER Build squads like a pro, with full control over strength and cost. Automatically calculate team strength for 2, 3, or 4-star builds. Position players under different managers. Save unlimited squads and experiment freely. Use Auto Build for quick team generation. Track contract cost totals for better squad planning. GAME PLAN Simulate off-the-ball movement in attack and defense to spot tactical strengths and weaknesses in your squad. HIDDEN GEM FINDER Discover underrated players with high potential and low contract renewal cost — perfect for long-term builds. MY TEAM Save your favorite players and managers to access quickly when building squads or browsing stats. SKILL MOVE TUTORIALS Learn how to perform dribbling skills step-by-step with controller animations — for both mobile and console players. Disclaimer This is an app designed for learning and planning purposes. It is not affiliated with or endorsed by any football game developer or publisher. COMMUNITY Share builds, discuss tactics, and learn from other players. Comment on player builds and squad setups. Vote on the best builds from the community. Follow other players and see their latest builds. > Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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
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.
