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
Tetris®
Welcome to TETRIS®, the official mobile app for the world’s favorite puzzle game
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.5
451,554 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
Make this idea yours
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 Tetris®: 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
Add multiple game modes like timed challenges or multiplayer.
Assumption to check: Limited single-player modes
Validate with people who use this workflow before building.
Hypothesis 2
Provide more free content and less intrusive monetization.
Assumption to check: In-app purchase pressure
Validate with people who use this workflow before building.
Hypothesis 3
Introduce power-ups and special tetrominoes for strategic play.
Assumption to check: Lack of depth in gameplay
Validate with people who use this workflow before building.
Hypothesis 4
Implement a more balanced ad strategy with fewer interruptions.
Assumption to check: Ad frequency can disrupt gameplay
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
Welcome to TETRIS®, the official mobile app for the world’s favorite puzzle game. Play through hundreds of unique TETRIS Levels in a new Tetris experience. Play a quick round to beat your own score, or play infinite rounds to master your skills in the TETRIS Single Player Modes. TETRIS forever! Enjoy the ultimate block puzzle game with these amazing features: PLAY HUNDREDS OF TETRIS LEVELS • Puzzle your way through challenging but fun objectives by playing Tetris. • The classic Tetris game with a twist! • Improve your gameplay by learning new tricks and master the hardest levels! • Play Tetris like never before! Clear lines and solve level puzzles. TETRIS SINGLE PLAYER • Master your skills with the iconic Tetris gameplay you know and love. * Pick between the Marathon mode for endless rounds or the new Quick Play Mode for when you want to play Tetris but only have a few minutes to play. • Rotate Tetriminos, clear lines and crush your high score. • Available offline - enjoy Tetris anytime, anywhere. PUZZLE YOUR WAY • Complete Daily Challenges in your favorite modes to earn XP and rewards. • Enjoy intuitive touch controls or choose on-screen controls. • Personalize your game experience and Player Profile with custom themes, backgrounds, avatars and avatar frames. • Show off your Tetris style in case you’re featured in in-game videos. The world’s favorite block puzzle game is now a game for everyone to play anytime, anywhere. Tetris forever! Tetris® & © 1985~2024 Tetris Holding. All Rights Reserved. Sub-licensed to PLAYSTUDIOS®. Privacy policy: https://www.playstudios.com/privacy-policy/ Terms of Service: https://www.playstudios.com/terms/
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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
React Navigation
Redux
Firebase
AdMob
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.
