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
世界日報 World Journal
World Journal 世界日報
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.6
9,497 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 included18 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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for 世界日報 World Journal: map the core News 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 offline reading functionality with local storage.
Assumption to check: Limited offline access to articles
Validate with people who use this workflow before building.
Hypothesis 2
Allow users to customize notification preferences by topic.
Assumption to check: Push notifications not customizable
Validate with people who use this workflow before building.
Hypothesis 3
Add a personalized feed based on user reading history.
Assumption to check: Lack of personalized content recommendations
Validate with people who use this workflow before building.
Hypothesis 4
Introduce a search feature for bookmarks.
Assumption to check: Difficulties in finding saved articles
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
World Journal 世界日報 立足北美知天下事，一網帶您看遍世界 世界日報 App 提供 24 小時不間斷的即時新聞，內容包括美國、中國、台灣、香港等地，以及美國華人社區重大新聞，另有國際、財經、健康、生活、影視、娛樂、副刊藝文等各類報導，提供北美華人最豐富的原鄉及移民生活資訊，也以中文傳遞美國主流社會脈動，除了是北美華人的精神臍帶，也是溝通的橋樑，發展迄今已是北美地區最具影響力的中文媒體，全方位服務北美與全球熟悉中文的使用者。 ◆ App 主要功能與特色 1. 個人新聞：個人喜好往前放，新聞切換好方便 2. 個人版面：字體大小可自訂，舒適閱讀無負擔 3. 留言分享：臉書留言好方便，社群分享超簡單 4. 電子報紙：一周報紙任君看，假日周刊消磨趣 5. 即時推播：自訂推播不擾人，重大新聞最先知 Swipe and get news quickly. World Journal's application delivers the latest articles for chinese readers around the world. The application includes breaking news, developing story, politics, international, business, finance, stocks, sports, technology, entertainment, and more. This free app lets you read the latest updates wherever you are. Key features: 1. Personalize your news channel by re-ordering news categories to suit your preferences 2. Set text size to suit your preferences 3. Share articles to a range of social networks 4 .e-Paper provide a weekly newspaper on demand 5. Provide push notifications for big breaking news stories
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
Zustand
axios
react-navigation
BUILD KIT DIFFICULTY
Expert
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.
