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
Twitch: Live Streaming
Twitch is where thousands of communities come together for our favorite streamers, for the games we love, for the lulz, for each other, for whatever
Free · In-app purchases
OVERALL US RANK
#71
Grossing · all categories
REVENUE (Est)
$440K/mo
$246K - $635K
RATING
★ 4.7
2,829,946 ratings · Top 15%
Evidence scope: #71 is the current overall US Grossing chart position. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.
Build your own version
Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included19 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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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 Twitch: Live Streaming: map the core Photo & Video workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
Twitch is where thousands of communities come together for our favorite streamers, for the games we love, for the lulz, for each other, for whatever. Download Twitch and join millions enjoying live games, music, sports, esports, podcasts, cooking shows, IRL streams, and whatever else crosses our community’s wonderfully absurd minds. We’ll see you in chat. Here’s a convenient list of other awesome things about Twitch: Everyone is “about” community. We actually are one: Whatever you nerd out about, you can find your people on Twitch. Give support, get support: Find new streamers and subscribe to your favorites. Plus, unlock exclusive perks for your support. Start your own channel: The Twitch app is one of the easiest ways to start streaming. Just create an account, go live directly from the app, and bring people together around whatever you’re passionate about. You never know what you’ll find: Popular games are always live, but so are music festivals, rocket launches, street tours of Tokyo, and goat yoga. Yes, really. Dark mode: Y’all love this one. Black and purple have never looked this good together. Twitch's Terms of Service are available at https://www.twitch.tv/p/legal/terms-of-service/ For feedback and assistance, please visit our Support Center: https://help.twitch.tv Please note: This app features Nielsen’s proprietary measurement software which contributes to market research, like Nielsen’s TV Ratings. Please see http://priv-policy.imrworldwide.com/priv/mobile/us/en/optout.html for more information
Written user reviews are not shown here. Check current App Store reviews >
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 adaptive bitrate streaming to optimize data consumption.
Assumption to check: High data usage during streaming
Validate with people who use this workflow before building.
Hypothesis 2
Improve chat performance with real-time messaging solutions.
Assumption to check: Lag in chat responses during live streams
Validate with people who use this workflow before building.
Hypothesis 3
Enhance algorithm for personalized recommendations based on viewing habits.
Assumption to check: Difficulties in discovering new content
Validate with people who use this workflow before building.
Hypothesis 4
Allow users to customize their profiles with themes and layouts.
Assumption to check: Limited customization options for profiles
Validate with people who use this workflow before building.
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
Redux
axios
Firebase
react-navigation
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.
