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
Md Preview - Markdown Viewer
Md Preview renders your Markdown files with stunning clarity — right on your iPhone or iPad.
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.4
5 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.
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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 included15 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 Md Preview - Markdown Viewer: 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
Implement more formatting tools and templates.
Assumption to check: Limited formatting options for Markdown.
Validate with people who use this workflow before building.
Hypothesis 2
Add iCloud or other cloud storage support.
Assumption to check: No cloud sync feature.
Validate with people who use this workflow before building.
Hypothesis 3
Integrate more sharing platforms and formats.
Assumption to check: Basic sharing options.
Validate with people who use this workflow before building.
Hypothesis 4
Introduce a dark mode for better night-time usability.
Assumption to check: No dark mode option.
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
Md Preview renders your Markdown files with stunning clarity — right on your iPhone or iPad. Open any .md file from ChatGPT, Obsidian, Notion, GitHub, or 100+ other apps. Md Preview instantly shows a beautiful, fully-rendered preview with support for every Markdown feature you need. FEATURES • Full GFM Support — Tables, task lists, footnotes, strikethrough, and autolinks • Syntax Highlighting — 40+ programming languages beautifully colored • LaTeX Math — Inline and display equations powered by KaTeX • Mermaid Diagrams — Flowcharts, sequence diagrams, pie charts, and more • Dark Mode — Automatic theme switching that follows your system setting • 100% Offline — All rendering happens on-device. No data ever leaves your phone • Open From Anywhere — Works as a system file handler for .md files from any app • File History — Quickly reopen recent files with one tap • Share Extension — Receive Markdown files shared from other apps SUPPORTED FORMATS .md, .markdown, .mdown, .mkd, .mkdn, .mdwn, .mdtxt, .mdtext, .mdx, .rmd, .qmd Md Preview is the fastest way to read Markdown on iOS. No editing, no clutter — just a clean, beautiful preview.
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
Redux
react-navigation
@react-native-async-storage/async-storage
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.
