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
Stadium Live - Predict Sports
Stadium Live – Predict Sports, Compete, and Win Fandom Rewards
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
98,831 ratings · Top 15%
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 Stadium Live - Predict Sports: 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
Implement a clear history view for users to see past predictions.
Assumption to check: Users often find it hard to keep track of their predictions and results.
Validate with people who use this workflow before building.
Hypothesis 2
Simplify the subscription model and provide clearer value descriptions.
Assumption to check: In-app purchases may confuse users with too many options.
Validate with people who use this workflow before building.
Hypothesis 3
Utilize WebSocket for instant match updates.
Assumption to check: Real-time updates can be slow or inaccurate.
Validate with people who use this workflow before building.
Hypothesis 4
Enhance social interaction by adding friend challenges and sharing features.
Assumption to check: Social features are often lacking in sports prediction apps.
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
Stadium Live – Predict Sports, Compete, and Win Fandom Rewards Predict sports game outcomes and player performances with over 1 million sports fans on Stadium Live, where you can wager no-money virtual coins, compete for fandom rewards, and claim the ultimate sports fan bragging rights. MAKE PREDICTIONS & EARN COINS Use your virtual coins to make bold predictions on games and players, then climb the leaderboard to prove you’re the ultimate sports fan. SCORE FANDOM PRIZES & BOOSTS Nail your predictions and complete challenges to unlock exclusive fandom prizes, in-app boosts, and special profile badges—because winners deserve rewards. TOP SPORTS LEAGUES YOU CAN PREDICT Predict the action in the NFL, NBA, MLB, NHL, EPL, La Liga, Champions League, MLS, Serie A, UFC, MMA, and more! GET A 10,000 COIN WELCOME BONUS Join Stadium Live and start with 10,000 coins to make predictions and climb the leaderboards faster! TEAM UP & WIN BIG Invite friends to stake predictions together—hit your picks and unlock vaults of rewards for even bigger prizes! RISE UP THE LEADERBOARDS Challenge your friends and fans around the world—make the right calls, rank up, and claim the top spot! STACK YOUR COMBOS Increase your rewards by combining multiple predictions into Combos for a chance at bigger payouts and greater glory. REAL-TIME STATS & LIVE CHAT Get live stats and updates while the games unfold, and chat with thousands of fans as you track your predictions in real time. Download Stadium Live now and start predicting your way to the top of the sports world! Check us out on: TikTok: @stadiumliveapp IG: @stadiumliveapp Website: stadiumliveapp.com Discord community: stadiumliveapp.com/discord Disclaimer: The Stadium Live app and website are not sponsored by, endorsed by, or affiliated with any professional sports team or league. Stadium Live uses virtual currency and is intended for entertainment purposes only. No purchase is necessary to participate. Stadium Live is aimed towards a mature audience (17+). This app offers only virtual coin gaming for entertainment purposes. All game mechanics involve virtual coins and credits with no cash value. There is no cash-in and cash-out on Stadium Live. Success at Stadium Live does not imply future success at real money gaming or sports betting. Players must be 18 or older to participate in contests and giveaways. Privacy Policy: https://www.notion.so/stadiumliveapp/Privacy-Policy-027040c4af6348728af139b7e2eb8ed9 Terms of Use: https://www.notion.so/stadiumliveapp/Terms-of-Use-295fc04b7f0844d3bb9ebde3a3b2b086
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
Zustand
Axios
react-navigation
react-native-paper
BUILD KIT DIFFICULTY
Expert
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.
