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
Cat - 浏览器起始页美化 for Safari
Cat是一款Safari浏览器扩展APP，它可以让你的浏览器起始页变得更加可爱和有趣。每次打开浏览器，你都会看到一只可爱卡通风格的猫咪，让你的心情变得更加愉悦。
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
2 ratings · Top 5%
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/
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 Cat - 浏览器起始页美化 for Safari: map the core Lifestyle 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
Introduce more themes and layout options.
Assumption to check: Limited customization options for the homepage
Validate with people who use this workflow before building.
Hypothesis 2
Add folders or tags for better organization.
Assumption to check: No ability to categorize bookmarks
Validate with people who use this workflow before building.
Hypothesis 3
Implement cloud syncing for user bookmarks.
Assumption to check: Lack of sync across devices
Validate with people who use this workflow before building.
Hypothesis 4
Provide insights on frequently used bookmarks.
Assumption to check: No analytics on bookmark usage
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
Cat是一款Safari浏览器扩展APP，它可以让你的浏览器起始页变得更加可爱和有趣。每次打开浏览器，你都会看到一只可爱卡通风格的猫咪，让你的心情变得更加愉悦。 除了可爱的猫咪外，Cat还提供了一个搜索框，让你可以快速搜索想要的内容。如果你觉得搜索框有些碍眼，你也可以隐藏它，让浏览器起始页更加简洁和美观。 使用Cat非常简单。只需在Safari浏览器中下载安装Cat扩展，选择你喜欢的猫咪和是否显示搜索框，即可完成美化。同时，Cat还提供了详细的使用说明和技术支持，让你能够快速上手并解决遇到的问题。 如果你想让你的Safari浏览器起始页变得更加可爱和有趣，同时又提高搜索效率，那么Cat是一个不错的选择。它让你的上网体验更加愉悦和便捷。现在就下载Cat，让可爱的猫咪陪伴你的每一次浏览吧！ Terms of Use(EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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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
Supabase
react-native-gesture-handler
react-native-reanimated
expo-router
BUILD KIT DIFFICULTY
Starter
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.
