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
Fliff - Social Sportsbook
Make picks and predictions with millions of sports fans — Fliff is the best social sportsbook app to play, win rewards and make sports picks together daily!
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
163,482 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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Combine features and design from your favorite apps.
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What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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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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 Fliff - Social Sportsbook: 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
Enhance social sharing and interaction capabilities.
Assumption to check: Limited social interaction features compared to popular social media apps
Validate with people who use this workflow before building.
Hypothesis 2
Implement a guided onboarding process.
Assumption to check: Confusing navigation for new users
Validate with people who use this workflow before building.
Hypothesis 3
Introduce AI-driven pick recommendations based on user behavior.
Assumption to check: Lack of personalized content recommendations
Validate with people who use this workflow before building.
Hypothesis 4
Create a robust notification system for real-time updates.
Assumption to check: Limited notification system for activity updates
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
Make picks and predictions with millions of sports fans — Fliff is the best social sportsbook app to play, win rewards and make sports picks together daily! We bring the thrill of a social sportsbook to fans who love picks, football, soccer, baseball and competing together. With free-to-play gameplay, prize picks with real prizes, and community-driven leaderboards, Fliff is the top picks app built around competition and connection. ▶ DAILY REWARDS & PROMOS Make the most of daily rewards with Fliff Coins, Fliff Cash, bonuses, and loyalty perks. Every pick earns rewards, giving you more ways to play, compete, and earn. ▶ A SOCIAL SPORTSBOOK EXPERIENCE Fliff is a social sportsbook created for fans who love picks and friendly competition. Make predictions, compete against friends, duel with other players, climb the leaderboards, and show your sporting knowledge through every pick. ▶ LIVE SPORTS PICKS Pick every game across the biggest leagues — football, soccer, baseball and more. Follow live results, make picks on every match, and compete in daily social sportsbook contests to top the leaderboard. ▶ SOCIAL SPORTSBOOK PICKS Enjoy picks including spreads, totals, parlays, and more. Fliff brings the excitement of the social sportsbook in a free-to-play environment. Whether you are a casual fan or follow every game, Fliff makes picking fun and competitive. ▶ PLAY TOGETHER WITH SOCIAL FEATURES Challenge friends, compare picks, complete challenges, unlock badges, and earn loyalty rewards. This lets you track your progress, improve your strategy, and compete with fans from around the country. ▶ FREE-TO-PLAY Play with Fliff Coins to move up the leaderboards and enjoy the full social sportsbook experience. Use free Fliff Cash to enter for the chance to win real cash prizes. No purchase is required, and Fliff Coins and Fliff Cash are available so the game never stops. ▶ PLAY ALL YOUR FAVORITE SPORTS Offering wide coverage so you can make picks across all the leagues you love, including: Football Basketball College Sports Baseball Hockey MMA and UFC eSports And so many more. ▶ BUILT FOR EVERY TYPE OF SPORTS FAN From daily login rewards to constant challenges, we deliver endless entertainment and live action. Whether you enjoy the social sportsbook, playing your favorite leagues, or love testing your picks daily. Claim rewards, make sports picks and stay engaged every day with Fliff. Join millions of fans and unlock rewards through daily challenges. Download the best app for sports picks and experience your favorite sports in one place. The best sports picks app with free-to-play prizes. Follow football and all your favorite sports throughout the season. ▶ LEGAL & DISCLOSURES The social sportsbook accessible via the Fliff app is solely sponsored and administered by Fliff, Inc. Neither Google nor Apple is a sponsor of, affiliated with, or responsible for conducting the contests. No purchase is necessary to participate. Void where prohibited. See Terms of Use for eligibility. There is no real-money gaming offered in this app. Fliff provides a simulated social sportsbook experience intended for entertainment purposes only. You must be 18 years or older to create an account and play.
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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
Firebase
Redux
Axios
React Navigation
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.
