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
《聖經詩歌》數位呈現版
《聖經詩歌》數字呈現版APP整合臺灣福音書房現有四款數字呈現版APP，數字內容包含《聖經恢復本》（繁體字版）收錄繁體中文新舊約聖經恢復本註解版合訂本，全書共3,300餘頁；《聖經恢復本》（簡體字版）收錄簡體中文新舊約聖經恢復本註解版合訂本，全書共2,700餘頁；《簡譜詩歌》（繁體字版）收錄繁體中文詩歌、補充本詩歌及兒童詩歌；《簡譜詩歌》（簡體字版）收錄簡體中文詩歌、補充本詩歌及兒童詩歌。
$19.99 · In-app purchases
PRICE
$19.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.6
5 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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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/
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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for 《聖經詩歌》數位呈現版: 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
Offer a community feature for users to upload and share hymns.
Assumption to check: Limited hymn selection compared to physical hymnals
Validate with people who use this workflow before building.
Hypothesis 2
Enhance audio quality and provide options for different audio formats.
Assumption to check: Difficulties with audio playback quality
Validate with people who use this workflow before building.
Hypothesis 3
Implement a more user-friendly subscription management interface.
Assumption to check: Subscription management can be confusing
Validate with people who use this workflow before building.
Hypothesis 4
Introduce offline access to downloaded hymns.
Assumption to check: Lack of offline access for hymns
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
《聖經詩歌》數字呈現版APP整合臺灣福音書房現有四款數字呈現版APP，數字內容包含《聖經恢復本》（繁體字版）收錄繁體中文新舊約聖經恢復本註解版合訂本，全書共3,300餘頁；《聖經恢復本》（簡體字版）收錄簡體中文新舊約聖經恢復本註解版合訂本，全書共2,700餘頁；《簡譜詩歌》（繁體字版）收錄繁體中文詩歌、補充本詩歌及兒童詩歌；《簡譜詩歌》（簡體字版）收錄簡體中文詩歌、補充本詩歌及兒童詩歌。 此APP支持iPhone、iPad等設備，安裝後可離線閱讀，不需上網連線。每本書均採用現有印刷書報排版格式呈現；提供『雙層目錄』加快翻閱速度；支持屏幕縮放大小，增進閱讀效率。 ■ 技術客服：任何使用上的問題，歡迎來信：[email protected]，會有專人為你服務、解答。
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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-navigation
expo-av
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.
