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
RPGViewer
RPGViewer provides a runtime environment for RPGMV/RPGMZ and Flash projects
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.5
45 ratings · Top 50%
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 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/
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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 RPGViewer: map the core Utilities 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
Include user reviews and ratings for RPGs.
Assumption to check: Limited user feedback options for RPGs
Validate with people who use this workflow before building.
Hypothesis 2
Enable sharing RPGs directly to social media platforms.
Assumption to check: Lacks social sharing features
Validate with people who use this workflow before building.
Hypothesis 3
Simplify the UI for better user experience.
Assumption to check: Cluttered UI with too many elements
Validate with people who use this workflow before building.
Hypothesis 4
Implement offline storage for viewing RPGs without internet.
Assumption to check: No offline access to RPG data
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
RPGViewer provides a runtime environment for RPGMV/RPGMZ and Flash projects. It also includes the following optimizations: * Compatible with the ogg audio format. No need to re-encode audio to m4a for playback. * Adds a virtual keyboard. Supports common button functions, with customizable button layouts planned for future updates. * Supports remote loading of Flash files via URL. What you can do with RPGViewer: * Run your existing RPGMV projects, or work-in-progress demos, to quickly preview and verify them on the go. * Quickly try out swf Flash files. Notes: * This app provides a runtime environment only and does not include any runnable content. Please make sure the projects you run are obtained through legitimate channels. * The runtime environment provided by this app uses generic technology. It does not modify the source code of RPGMV/Flash projects, nor does it emulate RPGMV/Flash.
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
React Navigation
Axios
React Native Paper
TypeScript
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.
