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
Block Out! - Color Sort Puzzle
Get ready for Block Out!, a block puzzle game where every level feels alive
Free · In-app purchases
OVERALL US RANK
#58
Grossing · all categories
REVENUE (Est)
$713K/mo
$403K - $1.0M
RATING
★ 4.7
350,467 ratings · Top 15%
Evidence scope: #58 is the current overall US Grossing chart position. 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 Block Out! - Color Sort Puzzle: 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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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
Get ready for Block Out!, a block puzzle game where every level feels alive. Slide colorful blocks, match them with their targets while experiencing the unique twist of moving elevators and block generators. Each puzzle feels fresh with ever-changing layouts. Plan your moves, think quickly, and enjoy the satisfaction of perfect clears as you progress through a colorful and evolving puzzle adventure. Block Out! offers a puzzle experience that keeps you coming back for more. Accept the challenge and start your journey! Quick Play Guide - Start Simple: Slide the blocks to the matching doors and create satisfying clears. - Plan Ahead: Position blocks carefully, manage space, and keep up with dynamic challenges. - Think Fast: Move faster to complete levels and unlock new challenges. Cool Features - Offline Play: Enjoy anywhere, anytime—no wi-fi required. - Strategic Gameplay: Start simple, think twice. Plan your moves and experience the satisfaction of clearing each puzzle. - Dynamic Obstacles: Block generators, moving elevators, and other elements bring variety and spice to every level. - Colorful Visuals: Bright and gorgeous design makes every puzzle a joy to solve. Block Out! is designed for puzzle lovers who enjoy both strategy and action. Download Block Out! now and explore the dynamic world of colorful puzzles.
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
Introduce unique levels and challenges to keep users engaged.
Assumption to check: Repetitive gameplay can become boring quickly
Validate with people who use this workflow before building.
Hypothesis 2
Implement a more user-friendly ad placement, such as rewarded video ads.
Assumption to check: Ads can interrupt gameplay
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to unlock or purchase unique block designs.
Assumption to check: Limited customization options for blocks
Validate with people who use this workflow before building.
Hypothesis 4
Optimize performance for smoother gameplay.
Assumption to check: Occasional lag during gameplay
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
Zustand
Supabase
React Navigation
React Native Reanimated
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.
