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
福音有声APP
《福音有声APP》整合台湾福音书房现有八款有声APP，包含《有声圣经》、《诗歌合辑》、《诗歌伴奏》、《生命读经》、《生命活泉》、《福音见证》、《故事聆听》、《童话绘本》等数字内容，并且支持iPhone、iPhone X、iPad、iPad Pro等设备之直向、横向显示。凡是先前已购买生命读经（有声APP）的用户可享免费升级（原先八款有声APP，将于此APP上架后下架）。
$29.99 · In-app purchases
PRICE
$29.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.8
8 ratings · Top 50%
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 included18 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 福音有声APP: 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
Focus on expanding content offerings and partnerships.
Assumption to check: Limited audio library compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Simplify navigation and enhance discoverability of features.
Assumption to check: User interface can be confusing
Validate with people who use this workflow before building.
Hypothesis 3
Introduce a more accessible entry-level subscription.
Assumption to check: Subscription pricing is high for new users
Validate with people who use this workflow before building.
Hypothesis 4
Implement offline downloads for audio content.
Assumption to check: Lack of offline listening options
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
《福音有声APP》整合台湾福音书房现有八款有声APP，包含《有声圣经》、《诗歌合辑》、《诗歌伴奏》、《生命读经》、《生命活泉》、《福音见证》、《故事聆听》、《童话绘本》等数字内容，并且支持iPhone、iPhone X、iPad、iPad Pro等设备之直向、横向显示。凡是先前已购买生命读经（有声APP）的用户可享免费升级（原先八款有声APP，将于此APP上架后下架）。 《福音有声APP》为云端版本，需上网播放。针对特殊需要，另有提供『加入书签』、『单首下载』功能。点选控制面板右方「书签」按钮，可标记书签；点选控制面板右方「下载」按钮，可将音文件下载脱机播放。此APP支持背景连续播放，即使屏幕自动锁定后，仍可连续播放。 ■ 技术客服：任何使用上的问题，欢迎来信：[email protected]，会有专人为你服务、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
Expert
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.
