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
回森
最近爆火的回森APP，是年轻人的音乐K歌社区！
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
1,019 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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A product spec, screen plans, and build steps for your coding agent.
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What's included20 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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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 回森: 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 better offline music caching and playback options.
Assumption to check: Limited offline functionality
Validate with people who use this workflow before building.
Hypothesis 2
Enhance music recommendation algorithms based on user listening habits.
Assumption to check: Difficulty in discovering new music
Validate with people who use this workflow before building.
Hypothesis 3
Focus on optimizing audio streaming quality and buffering.
Assumption to check: Inconsistent playback quality
Validate with people who use this workflow before building.
Hypothesis 4
Add features for sharing playlists or songs with friends.
Assumption to check: Lack of social features
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
最近爆火的回森APP，是年轻人的音乐K歌社区！ 【爆火的弹幕合唱】 唱弹幕是回森独特的唱歌方式，几秒钟一个歌声弹幕一张嘴就停不下来。给好友的作品发射满屏歌声弹幕是森友们最上瘾的互动玩法，可以用多位好友的弹幕组成一个超震撼合唱团作品。 【更舒服的K歌体验】 Ai美音功能来袭，精准塑造更完美的你！回森专研实验室级别K歌音效、智能升降调、一键修音、超新潮音乐视频模版、特效、配图，唱歌的小烦恼通通为你搞定。 【歌房陪伴不打烊】 或嗨唱、或畅聊，抢唱、点唱、PK、自由麦，你想要的功能这里都有。但是更重要的，这是一个24小时不打烊的陪伴空间。 【与懂你的人相聚】 天团是森友们的兴趣小群组，加入天团可以遇到一群志同道合的新朋友，大家互唱弹幕、互送礼物、一起泡歌房……还可以参加丰富的天团活动赢取荣誉和奖励，比如天团PK赛、天团音乐节等。
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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
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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.
