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
YouTube Kids
Inspire your kids to uncover their unique interests
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.6
2,697,444 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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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 YouTube Kids: map the core Entertainment 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 advanced recommendation algorithms based on user preferences and viewing history.
Assumption to check: Limited content discovery options for kids
Validate with people who use this workflow before building.
Hypothesis 2
Design a more user-friendly parental control interface with clear instructions.
Assumption to check: Parental control settings can be confusing
Validate with people who use this workflow before building.
Hypothesis 3
Introduce diverse content categories and regular updates to keep the app engaging.
Assumption to check: Repetitive content can lead to boredom
Validate with people who use this workflow before building.
Hypothesis 4
Ensure strict ad moderation and offer an ad-free subscription option.
Assumption to check: Ads can be inappropriate even in kids' content
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
Inspire your kids to uncover their unique interests Help your kids explore video content they love and parents trust, in an app made just for kids. With easy navigation tools and a suite of features, you can help your kids spend time online uncovering new interests, unleashing their imagination, and building their confidence in their own unique world. Help your kids grow at their own pace Your kids are unique, so they should only see content they're ready to explore. Decide what videos will help them make the most of their time online, then personalize individual profiles using custom content filters as they grow. - Help your youngest kids learn their ABCs, nurture their curiosity, and more in the Preschool mode. - Expand your kids interests to songs, cartoons, or DIY crafts in Younger mode. - Give your older kids the freedom to search popular music and gaming videos in Older mode. - Or hand-pick the videos, channels, and collections your kids can see in Approved Content Only mode. Rewatch videos and bond over favorites Quickly find your kids’ favorite videos and the content you’ve shared with them in the Watch it Again tab. Shape your kids’ viewing experience with Parental Controls Parental Control features help you limit what your kids watch and better guide their viewing experience. Our blocking process aims to help keep videos on YouTube Kids family-friendly and safe – but each family's preferences are unique. Don't like a video or channel, or see inappropriate content? Flag it for our team to review. Set a screen-time limit Encourage your kids to take a break in between exploring content. Use the Timer feature to freeze the app when screen time is up so your kids can apply their new skills to the real world. See important information - Parental setup is needed to ensure the best experience for your family. - Kids may see commercial content from YouTube creators that are not paid ads. - See The Privacy Notice for Google Accounts managed with Family Link for information on our privacy practices for signing in with a Google Account. - If your kids use the app without signing in with their Google Account, the YouTube Kids Privacy Notice applies.
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.
