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
Slinky Sort: Sorting Puzzle 3D
Love sorting puzzle games and relaxing brain teasers?
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.9
17,991 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.
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'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 Slinky Sort: Sorting Puzzle 3D: 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
Introduce varied levels and challenges to maintain engagement.
Assumption to check: Repetitive gameplay can become dull.
Validate with people who use this workflow before building.
Hypothesis 2
Implement a premium version for an ad-free experience.
Assumption to check: Frequent ads can disrupt user experience.
Validate with people who use this workflow before building.
Hypothesis 3
Add friend challenges and social sharing options.
Assumption to check: Limited social features reduce competitiveness.
Validate with people who use this workflow before building.
Hypothesis 4
Provide clear value for purchases and better rewards.
Assumption to check: In-app purchases can feel predatory.
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
Love sorting puzzle games and relaxing brain teasers? Remember the classic Slinky spring and its mesmerizing stretch and bounce? Slinky Sort turns that oddly satisfying motion into a relaxing yet strategic puzzle adventure! Sort and stack colorful Slinky coils into matching tubes. Watch them stretch, slide, and spring into place as you solve fun sorting puzzles. Plan every move carefully — mix the wrong colors, and you will fail! Slinky Sort: Sorting Puzzle 3D perfectly combines satisfying physics mechanics, addictive sorting games gameplay, and top brain teasers challenges that keep your mind sharp and your mood calm. MAIN HIGHLIGHTS Feel the Slinky Effect: Experience the realistic, bouncy motion of the classic Slinky toy as you stack and sort coils. Each move feels soothing, satisfying, and fun. Sort Colors & Stack Coils: Match and organize vibrant slinkys into the correct tubes. It’s a relaxing brain teaser where logic meets creativity. Train Your Brain with Strategic Gameplay: Easy to learn but hard to master — think ahead like a pro puzzler, because one wrong move can cost you the game. Daily Rewards: Come back every day and open rewards that grow in value. Watch short videos to multiply your progress and climb faster through levels. Collect Special Items: Join limited-time events and collect rare items hidden inside levels to earn exciting prizes! Spin the Wheel: Every 10 wins, you’ll get a chance to spin the reward wheel for amazing bonuses! Want another try? Watch a short video to spin again. The wheel unlocks at level 35 — perfect for advanced puzzlers looking for extra excitement and rewards. Piggy Bank: Save premium coins as you play. Once full, unlock your Piggy Bank at a special price and enjoy exclusive rewards — a fun way to boost your progress in Slinky Sort! Season Pass: Play through Free and VIP reward tracks, unlock exclusive bonuses, and challenge yourself to complete each season’s puzzles before time runs out. WHY YOU’LL LOVE SLINKY SORT • A fresh twist on sorting puzzle games with satisfying Slinky physics. • Brain-teasing challenges that relax and engage your mind. • Collect rewards, build voxel islands, and progress through creative levels. • Spin the wheel, earn bonuses, and keep your progress rolling. • Perfect for fans of sorting puzzle games. Download Slinky Sort today and enjoy the ultimate mix of sorting puzzles, satisfying motion, and creative relaxation!
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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
Supabase
Zustand
expo-gl
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.
