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
小宇宙·一起听播客
小容量手机福音，可以很细致的设置存储空间大小。
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
1,518 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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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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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 小宇宙·一起听播客: map the core Music 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 full offline support to enhance user experience.
Assumption to check: Limited offline functionality, only some episodes available for download.
Validate with people who use this workflow before building.
Hypothesis 2
Enhance search capabilities with advanced filters and suggestions.
Assumption to check: Lack of intuitive search functionality, making it difficult to find specific podcasts.
Validate with people who use this workflow before building.
Hypothesis 3
Offer an ad-free subscription option for a better user experience.
Assumption to check: Ads can disrupt the listening experience.
Validate with people who use this workflow before building.
Hypothesis 4
Simplify the UI for better usability on various screen sizes.
Assumption to check: User interface can feel cluttered on smaller screens.
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
小容量手机福音，可以很细致的设置存储空间大小。 —— JoJo 界面特别清新，比其它APP界面简洁，可以根据听到哪一段进行评论，评论区有很多令人感同身受的观点。 —— 南城以南温暖如初 统计收听时长这个功能最满意。 —— 苏灰 是专门做播客的app，和其他音乐软件或者音频软件不一样，内容更符合我的需求，并且有推送播客节目和评论区时间戳这样的小功能，提升了用户体验。 —— 靓靓 点赞时间戳真的很棒的创意，好好优化一定是小宇宙的特色功能，亮点都被用户标记出来了，对节目的预判就更高。 —— 方木仔頭家 以上都是我们收到的真实用户反馈。 ------------------------- 小宇宙 App 是为播客而生的产品。播客听众值得一个更好的选择，我们总觉得能做点什么。 - 快速选择，每日发现页上新，让你发现好播客； - 高能点赞，同步不同用户的高能时刻，帮你找到高光片段； - 友好交流，高质量播客内容讨论，和懂播客的人谈天说地； - 细致记录 ，精确记录收听播客的每一分钟； - 搜索精准，全网搜索想听的播客； - 一键导入，快速迁移自己的订阅列表。 有任何意见和反馈，请在app里的“问题反馈”目录里告诉我们，期待你的消息！ ------------------------- 【小宇宙 PLUS 会员服务说明】 1. 小宇宙 PLUS 包含几种订购类型和价格 连续订阅产品 1个月 / 15元 12个月 / 120元 2. 首次订购后会通过 iTunes 账户直接支付。若是订阅类型，账户会在到期前 24 小时内扣费，扣费成功后自动顺延一个订阅周期。 3. 本服务由您自主选择是否续订，如需取消，请在订阅到期 24 小时前，在 ApplelD 设置中取消。 4.小宇宙会员协议: 小宇宙会员服务协议 https://post.jellow.club/xyz-plus-member-terms/ 小宇宙会员自动续费服务协议 https://post.jellow.club/xyz-plus-renewal-terms/ 5.小宇宙软件用户协议与隐私政策: 小宇宙软件许可及服务协议 https://post.xiaoyuzhoufm.com/podcast-agreement/ 小宇宙隐私政策 https://post.jellow.club/podcast-privacy/
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.
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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.
