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
ShuBook 2P 書僕
自動轉換中文橫排為豎排、簡體為繁體、文字為語音的讀書與聽書app首選
$9.99 · In-app purchases
PRICE
$9.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.4
7 ratings · Top 30%
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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What's included17 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 ShuBook 2P 書僕: 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
Implement advanced algorithms for better suggestions.
Assumption to check: Limited personalization features for book recommendations.
Validate with people who use this workflow before building.
Hypothesis 2
Simplify navigation and reduce cognitive load.
Assumption to check: Cluttered interface with too many options.
Validate with people who use this workflow before building.
Hypothesis 3
Add offline reading capabilities for downloaded books.
Assumption to check: No offline reading options available.
Validate with people who use this workflow before building.
Hypothesis 4
Introduce a freemium model with limited features for free users.
Assumption to check: Subscription model may deter users.
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
自動轉換中文橫排為豎排、簡體為繁體、文字為語音的讀書與聽書app首選 ShuBook 2P has all the functionalities of ShuBook 2M, plus extensive Chinese book specific features. ■ 中文書專用特色（Chinese book specific features） ① 新的圖章型中文專用控制界面：印泥紅框，內含四個帶藍字半透明按鈕，分別控制橫豎、線框、簡繁、字體的轉換；圖章本身可以自由拖動 ② 橫排與豎排的雙向轉換：原本為橫排設計的書也可以豎排（直排）讀 ③ 豎排線框：有線框為仿古線裝書風格，格調優雅；無線框為仿今平装書風格，格調簡約 ④ 簡體字與繁體字的雙向轉換：一個簡體字可能對應多個繁體字（正體字），正確轉換需要看前文後理。新算法再次提高了分析前文後理的能力，簡繁轉換的準確率繼續遠遠領先於同類軟件 ⑤ 內置三套優質字體（明體、楷體、黑體）：可以在同一本書裡混合使用，例如一般文字為明體，標題為黑體，而引文或韻文（如詩詞歌賦等）為楷體，讓版面更美觀、更好讀 ⑥ 控制界面自動適應橫排與豎排：跳頁滑桿、書頁底部顯示閱讀進度幼線、翻頁手勢等的前進後退方向都一起隨橫排豎排的切換而變 ⑦ 中文書與外文書各自一套排版參數設定，互不干擾：比如中文書用楷體，對應行距要較大；外文書則用 Georgia，對應行距可較小。 ⑧ 自動產生多字體混編書：內置的碧瑪版《西遊記》示範了如何以空格符號去標記韻文或引文，以微小的增量編輯成本，得到超值的排版效果 ⑨ 支持讀者勘誤「好讀網站UPDB格式」書的整個流程：下載書本；發現錯謬，提出更正，並製作勘誤表；上傳勘誤表 ⑩ 支持自創的「書僕開放格式」，以方便用戶自己製作TXT電子書，格式簡易，效果美觀 ⑪ 支持聽書功能，適用於所有豎排中文書，可選普通話或廣東話、朗讀語速等等，關掉屏幕也可聽書 ■ READING BOOKS ① Read DRM-free and password-free books of 3 fluid-layout formats and 5 fixed-layout formats ② Read fluid-layout formats (EPUB, TXT, UPDB) in horizontal page-turning mode ③ Read fixed-layout formats (PDF, RTF, DOC, XLS, PPT) in vertical page-scrolling mode ④ Read in both portrait and landscape orientation ⑤ Long press on text to lookup built-in dictionary, read aloud, and copy ⑥ Sync book reading progress via AirDrop and email ⑦ Support all compatible iPhone and iPad models at native screen resolution ⑧ Provide an option to auto-reopen last book read at the page you left off for fluid-layout formats and fixed-layout formats For fluid-layout formats: ① Customize various layout parameters (font family, font size, text alignment, page margin, paragraph indentation, paragraph spacing, line spacing, letter spacing, hyphenation) and apply color themes ② Import unlimited number of user font files (TTF, TTC, OTF) via AirDrop, DropBox, Safari, Mail ③ Provide 16 built-in eye-pleasing color themes and 3 customizable color themes, where you can control background, text, heading and link colors ④ Jump to any page quickly and precisely via page slider with an unobtrusive reading progress line at the bottom of the page ⑤ Offer Night mode and brightness control by vertical swipe to complement iOS system brightness control via Control Center ⑥ Perform fast full text search and automatically save recent searches ⑦ Save an unlimited number of bookmarks per book ⑧ Long press on text to lookup built-in dictionary, read aloud, copy, search (and correct for UPDB) ■ MANAGING BOOKS ① Manage easily thousands of books in Library ② Group books by titles, authors, tags, and clusters with reading progress display ③ Group books by authors hierarchically in Library allowing multiple authors per book ④ Group books by tags hierarchically in Library allowing multiple tags per book ⑤ Group books by clusters hierarchically in Library allowing adding/removing/editing of clusters and re-ordering of clusters and their books ⑥ Search books in Library by title or author, or with help of the index bar ⑦ Edit book info, including title, author, tags and book cover image, for which you can choose from Album and online sources ■ GETTING BOOKS IN AND OUT ① Provide convenient access to millions of free ebooks from multiple sources (HTML websites and OPDS catalogs), including Dropbox and websites you input ② Perform TXT encoding auto-detection and TXT Smart Break after download/import of TXT files ③ Support downloading tags of books from OPDS catalogs ④ Smart batch download from calibre (and other OPDS servers on LAN) with an option to skip downloading books that are already in Library ⑤ Support iTunes File Sharing to import and export books ⑥ Send and receive books by email
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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 Navigation
Axios
React Query
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.
