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
ONE PIECE: Grand Gourmet
ONE PIECE comes to life as a restaurant management sim game!
$12.99
OVERALL US RANK
#31
Paid · all categories
REVENUE (Est)
$304K/mo
$177K - $431K
RATING
★ 4.7
278 ratings · Top 15%
Evidence scope: #31 is the current overall US Paid 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
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 included
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 ONE PIECE: Grand Gourmet: 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
ONE PIECE comes to life as a restaurant management sim game! As a new staff member, work alongside the Straw Hat Crew to turn the second location of the renowned Baratie floating restaurant into the greatest restaurant of the seas! -Dish Out a Signature Menu Get inspired by characters' ideas, choose your ingredients, and work with Sanji to cook delicious dishes. Arrange them into unique meal sets by adding different flourishes, then adventure to find even more recipes! From iconic series favorites like Water-Water Meat BBQ and Sea King Penne Gorgonzola to special creations that harness the powers of Devil Fruits, a treasure trove of dishes awaits. -Design A Tasteful Interior Choose from over 200 furniture, building, and decorative items to make your restaurant uniquely yours! From dessert-themed Whole Cake Island pieces to futuristic Egghead items, the customization options are as vast as the sea. If a character likes your design, they may even become a regular! -Table for 400 From the Straw Hat Crew and beyond, over 400 ONE PIECE characters appear as staff and customers in a spritely pixel style for the first time in a game! With so many characters, you'll experience character events and special character interactions that can’t be found anywhere else. Bandai Namco Entertainment Inc. Website: https://bandainamcoent.co.jp/english/ By downloading or installing this app, you agree to the Bandai Namco Entertainment Terms of Service. Terms of Service: https://legal.bandainamcoent.co.jp/terms/ Privacy Policy: https://legal.bandainamcoent.co.jp/privacy/ This application is distributed under the official rights from the license holder.
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
Offer affordable ad-free tier ($2.99)
Assumption to check: Too many intrusive ads
Validate with people who use this workflow before building.
Hypothesis 2
Cosmetic-only purchases, skill-based progression
Assumption to check: Pay-to-win mechanics
Validate with people who use this workflow before building.
Hypothesis 3
Add battery saver mode, optimize rendering
Assumption to check: Battery drain
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
Unity
Firebase
AdMob
RevenueCat
BUILD KIT DIFFICULTY
Not assessed in a Build Kit yet.
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.
