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
Google Chrome
Chrome helps you do what’s possible on the web
Free · In-app purchases
OVERALL US RANK
#35
Free · all categories
REVENUE (Est)
$146K/mo
$85K - $208K
RATING
★ 4.7
3,851,197 ratings · Top 15%
Evidence scope: #35 is the current overall US Free chart position. 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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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 Google Chrome: map the core Utilities 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
Optimize tab management to improve speed and responsiveness.
Assumption to check: Performance issues with multiple tabs open
Validate with people who use this workflow before building.
Hypothesis 2
Implement robust iCloud sync for bookmarks.
Assumption to check: Difficulty syncing bookmarks across devices
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to set custom homepages or shortcuts.
Assumption to check: Limited customization options for homepage
Validate with people who use this workflow before building.
Hypothesis 4
Enhance search algorithm for more relevant results.
Assumption to check: Inconsistent search results
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
Chrome helps you do what’s possible on the web. Download the fast, secure browser by Google. GET THE BEST OF GOOGLE IN CHROME • SEARCH WITH GOOGLE - Search and get answers on Google fast. Use your voice to search hands-free. • GOOGLE LENS - Search what you see on your screen or with your camera. • GOOGLE TRANSLATE - Explore the web in 130+ languages. Translate entire sites in one click. BROWSE WITH BEST-IN-CLASS SECURITY • ENHANCED PROTECTION MODE - Browse confidently with the highest level of Chrome’s security. • SAFETY CHECK - Get peace of mind with proactive safety alerts. • GOOGLE PASSWORD MANAGER - Securely generate and save passwords for fast sign-in, and get alerts if your passwords are at risk. ACCESS YOUR CHROME ACROSS DEVICES • SYNC ACROSS DEVICES - Save your things (like bookmarks, tabs, and passwords) and easily access them when you sign in to Chrome on your phone, computer or tablet. • TAB GROUPS - Create tab groups to stay organized across devices. • AUTOFILL - Save time typing by autofilling your saved payments, addresses and passwords. Feature availability varies by country and language. Compatibility varies. Check responses for accuracy.
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.
SUGGESTED BUILD STACK
React Native
Expo
react-navigation
axios
expo-sqlite
react-native-reanimated
BUILD KIT DIFFICULTY
Advanced
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.
