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
Linemate: Find Your Next Bet
Sports betting research can be made simple
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
14,335 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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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included18 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 Linemate: Find Your Next Bet: 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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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
Sports betting research can be made simple. Linemate is a FREE app, built for the everyday sports fan. There's no catch. Looking for a quick and smart play for today's big game? Little time to research after work? How about bragging rights for your betting group chat? Our new DISCOVER feature allows you to scroll through today's top data-backed recommendations in seconds. Literally. We believe it's about time that advanced analytics became accessible. Linemate is built to support research around your busy lifestyle. An abundance of bet types to choose from with minimal research has many sports fans trusting anything but themselves. That's where we come in. Transforming advanced game-level statistics into clear and informed betting insight. Save time and save money; in one app. Linemate is available across all major sports leagues, prop types, odds, and betting markets. NFL NCAAF AFL NRL NBA WNBA NCAAB NHL MLB SOCCER (EPL, La Liga, Serie A, Bundesliga, Ligue 1, Brasileiro Série A, MLS, Euro, UCL, UEL) Information is for entertainment purposes only. What you choose to do with the information provided here is your own decision. Linemate does not endorse illegal betting so follow your local laws. Please enjoy responsibly. If you or someone you know has a gambling problem and wants help, call 1-800-GAMBLER or a helpline in your area. Visit https://linemate.io/responsible-gambling for a list of helplines and websites. Terms of Service (www.linemate.io/terms) and Privacy Policy (www.linemate.io/privacy) Linemate Inc. is not affiliated with or endorsed by Apple, Inc., the NFL, NCAAF, AFL, NRL, MLB, NBA, WNBA, NCAAB, NHL, Bundesliga, EPL, LaLiga, Ligue 1, Serie A, Brasileiro Série A, MLS, Euro, UCL, UEL, nor is it a gambling site, and does not accept or place wagers of any type.
Written user reviews are not shown here. Check current App Store reviews >
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
Implement a more intuitive filtering and sorting system.
Assumption to check: Users find it hard to navigate between different types of bets.
Validate with people who use this workflow before building.
Hypothesis 2
Introduce forums or chat for users to discuss bets.
Assumption to check: Limited community engagement features.
Validate with people who use this workflow before building.
Hypothesis 3
Simplify the subscription model and improve visibility of benefits.
Assumption to check: Some users struggle with in-app purchases.
Validate with people who use this workflow before building.
Hypothesis 4
Enhance testing and error handling for smoother transactions.
Assumption to check: Occasional bugs in bet placement functionality.
Validate with people who use this workflow before building.
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
Zustand
React Query
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.
