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
JeffTalksStocks
杰夫介紹｜美籍华人，專職投資者
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 5.0
1 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/
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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 JeffTalksStocks: map the core Finance 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
Add features for user messaging and followings.
Assumption to check: Limited community engagement features, making it hard for users to connect.
Validate with people who use this workflow before building.
Hypothesis 2
Implement stock performance analytics and trends.
Assumption to check: Lack of advanced analytics on stock performance.
Validate with people who use this workflow before building.
Hypothesis 3
Allow more profile customization options and themes.
Assumption to check: Insufficient customization for user profiles.
Validate with people who use this workflow before building.
Hypothesis 4
Introduce a notification system for new replies and activity.
Assumption to check: Difficulty in tracking multiple discussions easily.
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
杰夫介紹｜美籍华人，專職投資者 杰夫是一位深耕投資多年的實戰派投資者，憑藉對市場的敏銳洞察力和穩健的投資策略，逐步累積了深厚的經驗。 多年來他透過每天分享自己的真實帳戶操作，將選股邏輯和投資心法毫無保留地傳遞給廣大投資者，幫助許多投資人提升對美股的了解，頻道至今累積近 2 萬粉絲追蹤。 為了幫助更多人簡化選股過程並提升投資效率，杰夫將多年累積的選股策略與實戰心得轉化為【杰夫選股APP】，這款工具專為想要穩健增值的投資者設計，讓每個人都能輕鬆應對市場波動，找到專屬的投資方向。 杰夫選股 APP 核心功能概覽： 羅盤智選股：杰夫親選重點股，搭配獨家指引，助你建立穩健配置 增長指引標：精選盈利穩定增長的大型股，快速找到長期增值機會 趨勢信號燈：均線多頭排列 x MACD 黃金交叉，一秒鎖定起漲佈局機會，掌握市場反彈信號 收益穩息源：篩選高配息、收益成長的優質股，輕鬆打造長期穩定現金流 VIP專屬社群：VIP訂戶專享社群，與杰夫及其他投資者交流分享，杰夫親自回應提問，解決投資疑惑 VIP內容專區：訂戶專享，每月至少 4 篇深度文章 + 1 場直播，杰夫親自分享市場洞察與策略解析
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
Supabase
Zustand
React Navigation
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.
