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
HTML Creator : Editor & Viewer
HTML Viewer & Editor is a fast and lightweight HTML editor for iPhone and iPad, built specifically for developers who need a reliable web development tool on the go.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.6
71 ratings · Top 15%
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 HTML Creator : Editor & Viewer: map the core Developer Tools 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
Offer a broader range of customizable templates.
Assumption to check: Limited templates for beginners
Validate with people who use this workflow before building.
Hypothesis 2
Allow users to share projects for collaborative editing.
Assumption to check: No collaboration features
Validate with people who use this workflow before building.
Hypothesis 3
Implement version history to track changes.
Assumption to check: Lack of version control
Validate with people who use this workflow before building.
Hypothesis 4
Enable exporting projects in various formats (HTML, PDF, etc.).
Assumption to check: Limited export options
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
HTML Viewer & Editor is a fast and lightweight HTML editor for iPhone and iPad, built specifically for developers who need a reliable web development tool on the go. Write, edit, and preview HTML in real time using a powerful built-in WebKit web view engine. Instantly switch between code and preview to test layouts, structure, and markup without leaving the app. Key Features - Live HTML preview - Built-in web viewer - Syntax highlighting code editor - Auto indentation - Dark and Light themes - Multiple editor themes - Save and manage multiple files - Line numbers - Search and replace - Custom fonts and adjustable text size - Tree view - Create, open, and manage HTML files - Free for everyone Perfect for frontend developers, web designers, and students who need a portable HTML editor and web preview tool. No ads. No subscriptions. No distractions. Just a clean and focused HTML development environment for iOS and iPadOS.
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
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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.
