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
UNO!™
UNO!™ is now mobile! Take the classic card game from the kitchen table anywhere! Now with new rules, world series tournaments, modes of play, and much more
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
651,967 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.
Build your own version
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/
Preview a sample Build Kit No email needed
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 UNO!™: map the core Games 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 robust matchmaking algorithm and allow players to create private matches.
Assumption to check: Long wait times for matchmaking in multiplayer games
Validate with people who use this workflow before building.
Hypothesis 2
Offer more in-depth customization and skins through in-app purchases.
Assumption to check: Limited customization options for cards and game modes
Validate with people who use this workflow before building.
Hypothesis 3
Introduce an ad-free premium subscription model.
Assumption to check: Frequent ads between games
Validate with people who use this workflow before building.
Hypothesis 4
Enhance social features to better showcase friends' achievements and gameplay.
Assumption to check: Difficulty in tracking friends' activities
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
UNO!™ is now mobile! Take the classic card game from the kitchen table anywhere! Now with new rules, world series tournaments, modes of play, and much more. Whether you’re at home, on the go, an UNO!™ veteran or completely new, UNO!™ has something for everyone in the family. UNO!™ is a fun and memorable family-friendly card game wherever and whenever. Ready. Set. UNO!™ - Play the classic card game, UNO!™, or select from a variety of house rules to play in real-time matches - Compete in tournaments and events to win free rewards and top the leaderboards - Partner up with friends or family, play in 2v2 mode, and collaborate to win - Connect anytime, anywhere with family and friends from around the world. FEATURES The Classic Game at your Fingertips New to UNO!™ or wanting to play your favorite card game? Tap Quick Play and start up a new game with classic UNO!™ rules. Get ready for new monthly rewards and events! Play with Friends Play with friends or family! Set up your own house rules and play your way. UNO!™ is a family-friendly party that makes it free and easy for anyone to join! Buddy Up Find a friend or family and partner up to battle in 2 player teams. Help each other reduce your hand (or your partner’s) to zero as quickly as possible to beat the other team! Connect, Chat, Shout UNO!™ Connect with your buddies in UNO!™ with clubs and send each other gifts. Make a strategy and remember to shout UNO before anyone else. New Challenges at Every Level Compete in World Series tournaments and special events to win free rewards. Top the leaderboards and show off to your friends and family! Then spin the wheel and try your fortune to get free rewards every day! Go Wild – No, Really This no-holds-barred mode is as wacky as UNO!™ gets. Forget the classic mode - house rules on, two-deck play, and free winnings up to 600 times what you put in to make you the coin master! But beware, in this wild game mode, you win big or go home empty-handed! Are you up for the challenge? UNO Championship Series Claim your daily tournament invitation to the official UCS Digital Qualifiers! Players who master all three Digital Qualifier Tournaments will earn their spot as a UCS Finalist and a chance at the title of UNO World Champion! Compete with the best of the best in Classic UNO—with a new Special Rules twist! NO PURCHASE NECESSARY. Open to legal residents of the 50 US/DC, age 18+. Qualification Rounds end at 4:59 pm PT on 9/26/26. See Official Rules for details: https://championship.matteluno.com Visit our official site at www.letsplayuno.com Follow us on Facebook for more updates: www.facebook.com/UNOnow
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
Firebase
React Navigation
React Native Reanimated
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.
