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
SpongeBob SquarePants
Are you ready, kids? Play as SpongeBob, Patrick, and Sandy and show the evil Plankton that crime pays even less than Mr
$10.99 · In-app purchases
PRICE
$10.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.4
1,490 ratings · Top 30%
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 included18 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 SpongeBob SquarePants: 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 more diverse quests and character interactions.
Assumption to check: Repetitive gameplay can lead to boredom.
Validate with people who use this workflow before building.
Hypothesis 2
Allow users to customize characters with outfits and accessories.
Assumption to check: Limited customization options for characters.
Validate with people who use this workflow before building.
Hypothesis 3
Simplify the purchase flow and clarify item benefits.
Assumption to check: In-app purchases can be confusing.
Validate with people who use this workflow before building.
Hypothesis 4
Offer an ad-free experience through a premium subscription.
Assumption to check: Ads 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
Are you ready, kids? Play as SpongeBob, Patrick, and Sandy and show the evil Plankton that crime pays even less than Mr. Krabs. Want to save Bikini Bottom from lots of rampant robots with your mighty bubbles? Of course, you do! Want to underpants bungee jump? Why wouldn't you! The battle is on! Features: - Play as SpongeBob, Patrick, and Sandy and use their unique sets of skills - Thwart Plankton's evil plan to rule Bikini Bottom with his army of wacky robots - Meet countless characters from the beloved series - Faithful remake of one of the best SpongeBob games ever created - High-end visuals, modern resolutions, and carefully polished gameplay - Game Center support - Full controller support Thank you for playing SpongeBob SquarePants: Battle for Bikini Bottom! Get in touch with HandyGamesTM: www.handy-games.com Join us on Facebook: HandyGames Subscribe to our YouTube channel: HandyGames Check news on Twitter: @handy_games Follow us on Instagram: handygames Imprint: http://www.handy-games.com/contact/ © www.handy-games.com GmbH
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
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react-native-reanimated
shadcn/ui
BUILD KIT DIFFICULTY
Advanced
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.
