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
CHM-Master
全能文档阅读器 - 轻松驾驭CHM/PPT/Word/TXT等30+格式,Zip解压！
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
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.
Build your own version
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 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 CHM-Master: map the core Books 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
Expand support to other formats like PDF or EPUB.
Assumption to check: Limited file format support beyond CHM files.
Validate with people who use this workflow before building.
Hypothesis 2
Implement offline storage for downloaded CHM files.
Assumption to check: No offline access to downloaded files.
Validate with people who use this workflow before building.
Hypothesis 3
Add filters and advanced search options for better file management.
Assumption to check: Lack of advanced search features.
Validate with people who use this workflow before building.
Hypothesis 4
Introduce cloud syncing for user files across devices.
Assumption to check: No syncing across devices.
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
全能文档阅读器 - 轻松驾驭CHM/PPT/Word/TXT等30+格式,Zip解压！ 无论您是技术开发者、学生还是办公族，CHM-Master都是您随身携带的智能文档库！ 核心亮点 完美解析CHM文件 精准还原电子书目录结构，快速跳转章节 夜间模式/字体缩放优化阅读体验，技术文档查阅从未如此高效 多格式一站式浏览 支持Office全家桶（Word/PPT/Excel）、PDF、TXT、RTF等主流格式 PPT幻灯片预览、Word文档格式保真，告别乱码烦恼 为效率而生 ► 闪电加载：百兆文档秒速开启 ► 智能解析：自动识别文档编码格式 ► 零学习成本：简洁直观的交互设计 适用场景 IT工程师查阅开发手册 学生党阅读电子书/论文 商务人士移动办公演示 小说爱好者沉浸式阅读 隐私承诺 我们恪守苹果隐私规范： 永不收集文档内容 立即下载，让专业阅读体验装进口袋！ "终于找到能流畅打开技术文档的App！CHM目录检索比电脑端还快" "上课课件、公司报表一个App全搞定，通勤路上效率翻倍"
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
react-navigation
expo-web-browser
react-native-vector-icons
BUILD KIT DIFFICULTY
Advanced
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.
