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
Epub繁简通
轻松跨越简繁差异，畅享无缝阅读体验！「Epub繁简通」让你在中文语言环境下自由转换书籍格式。不再为简繁体转换烦恼，无论是学习、工作还是娱乐，『Epub繁简通』都让你的电子书阅读更加顺畅。
$12.99 · In-app purchases
PRICE
$12.99
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.
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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 included15 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 Epub繁简通: 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
Include support for more eBook formats like PDF and MOBI.
Assumption to check: Limited support for multiple formats
Validate with people who use this workflow before building.
Hypothesis 2
Provide more themes and font customization options.
Assumption to check: Lack of user customization options
Validate with people who use this workflow before building.
Hypothesis 3
Implement offline access for downloaded books.
Assumption to check: No offline reading capabilities
Validate with people who use this workflow before building.
Hypothesis 4
Offer a more flexible pricing structure with tiered access.
Assumption to check: High subscription cost
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
轻松跨越简繁差异，畅享无缝阅读体验！「Epub繁简通」让你在中文语言环境下自由转换书籍格式。不再为简繁体转换烦恼，无论是学习、工作还是娱乐，『Epub繁简通』都让你的电子书阅读更加顺畅。 主要功能： * 简繁互换：支持epub、txt、md、srt格式的自由转换。 * 横竖切换：支持epub的横竖屏切换，导出阅读时，请确保您的阅读器是支持epub横竖规范的（如苹果的「图书」），该功能现在为测试阶段，如遇问题，请联系作者，我们将不断完善。 * 极速转换：一键操作，秒级完成转换。 * 保持美观：保留原有排版和格式，无损阅读体验。 * 极简界面：直观操作，让你轻松上手。 适用场景： * 热爱阅读：无论偏爱简体还是繁体，满足你随时随地的阅读偏好。 * 教育工作者：为教学提供多语言支持，让学习更高效。 * 文化爱好者：跨越文字差异，促进简繁中文之间的文化交流。 马上下载『Epub繁简通』，开启你的无缝阅读之旅吧！让简繁转换不再是难题，让阅读更舒适、更贴心！
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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
zustand
react-native-gesture-handler
expo-router
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.
