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
Parlor: Retro Game Emulator
Parlor plays Game Boy, Game Boy Color, Game Boy Advance, DS and 3DS games
$0.49 · In-app purchases
PRICE
$0.49
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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.
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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included16 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
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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 Parlor: Retro Game Emulator: map the core Entertainment 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
Parlor plays Game Boy, Game Boy Color, Game Boy Advance, DS and 3DS games. iPhone, iPad, Apple TV and Mac. 3DS is on iPhone and iPad. Full speed, and it works with the Bluetooth controller you already have. Bring the games you own. There is a free homebrew title included so you can try it. Parlor does not include, download or link to commercial games. CONTROLLERS PlayStation DualSense and DualShock 4, Xbox, Switch Pro, Joy-Con, 8BitDo, Backbone, and any other MFi controller. Connect one and the on-screen buttons get out of the way. Remap anything. Keyboards work on iPad and Mac. YOUR SAVES Your saves sync across all your devices automatically, through your own iCloud. Start on your phone, pick up on the TV or the Mac. Only Apple has that data. We never see it. PLAY ON A TV AirPlay from your iPhone or iPad. Or plug in an HDMI cable. Or use the Apple TV app. All three work, so you can play on the big screen. DS Stack the screens, put them side by side, pin one in the corner, or show one at a time. Two-finger double-tap to swap. Each game remembers its layout. Touch on iPhone and iPad, mouse on Mac, right stick on Apple TV. No BIOS files. ALSO • Fast forward at 2×, 4× or 8× • Sharp, LCD and CRT filters, plus Game Boy palettes • Box art and titles filled in automatically • Favorites, sort and filter, play time per game • Zip and 7z archives • Siri, Spotlight, a Continue Playing widget, Handoff • Game Center achievements for using the app, not for beating a particular game • A Mac app with menus, keyboard shortcuts and proper window sizes • Send feedback to the developer from inside the app NO ACCOUNTS, NO TRACKING No analytics. If you send feedback, it is just your message and the app version. One purchase covers iPhone, iPad and Apple TV. Family Sharing, no in-app purchases. Parlor plays game files you already own. It is not affiliated with or endorsed by any console manufacturer.
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
Expand game offerings and partnerships.
Assumption to check: Limited game library compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Optimize performance and provide settings for users.
Assumption to check: Potential performance issues with emulation
Validate with people who use this workflow before building.
Hypothesis 3
Introduce social features to enhance engagement.
Assumption to check: Lack of community features (e.g., sharing, reviews)
Validate with people who use this workflow before building.
Hypothesis 4
Offer a freemium model with limited features to attract users.
Assumption to check: Subscription model may deter users
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
Redux
Axios
React Navigation
React Native Reanimated
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.
