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
Achoo HTML Viewer & Inspector
Achoo allows you to easily view the HTML for the webpage you're viewing in Safari
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.5
348 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'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 Achoo HTML Viewer & Inspector: 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 better parsing and rendering for complex HTML.
Assumption to check: Limited HTML rendering capabilities
Validate with people who use this workflow before building.
Hypothesis 2
Optimize WebView for handling large documents.
Assumption to check: Performance issues with large HTML files
Validate with people who use this workflow before building.
Hypothesis 3
Create a more guided onboarding experience.
Assumption to check: User interface can be confusing for beginners
Validate with people who use this workflow before building.
Hypothesis 4
Add features like network requests monitoring and JavaScript debugging.
Assumption to check: Lack of advanced inspection tools
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
Achoo allows you to easily view the HTML for the webpage you're viewing in Safari. It shows the HTML (as well as any inline CSS and JavaScript) with beautiful and fast syntax highlighting. You can share the HTML you're viewing, allowing you to easily inspect it on an external device of your choosing, or send it to a friend, or simply copy it to your clipboard. You can edit the font if you'd like it smaller to display more information, or larger if you'd like to be able to make things out more clearly. You can also choose to edit the contents of the webpage, allowing you to make modifications and preview how they look. Changes are not permanent, simply refresh the page in Safari to return the page to its original state after you're finished previewing your changes. (Note: you're not editing the HTML directly, rather it's a visual editor of the contents of the page) As a bonus, it includes a variety of alternate home screen icons so you can customize the app to your liking beautifully.
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-native-webview
react-navigation
@react-native-async-storage/async-storage
styled-components
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.
