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
UC Browser
UC Browser: Private VPN & Fast
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.4
4,781 ratings · Top 30%
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 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 UC Browser: 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 loading times and resource usage.
Assumption to check: Slow performance on older devices
Validate with people who use this workflow before building.
Hypothesis 2
Offer an ad-free experience in premium version.
Assumption to check: Frequent ads in free version
Validate with people who use this workflow before building.
Hypothesis 3
Provide more themes and layout choices.
Assumption to check: Limited customization options
Validate with people who use this workflow before building.
Hypothesis 4
Enhance search algorithm for better accuracy.
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
UC Browser: Private VPN & Fast Secure your web access with built-in VPN. Experience professional search tools, smooth video streaming, and AI translation in one private, all-in-one browser. Privacy First: Secure VPN & Incognito Browse with peace of mind. Our integrated VPN and Incognito mode safeguard your online activity, ensuring your browsing history and personal data remain private and secure from end to end. Professional Search Insights Discover a higher standard of information discovery. Moving beyond standard AI search, UC Browser provides professional-grade tools to help you find accurate data and specialized resources. Gain deeper insights and access high-quality content with precision and efficiency. Smooth Binge-Watching Experience cinema-quality streaming. Our optimized player ensures ultra-fast loading and buffer-free playback for movies and series, even on unstable networks. Smart AI Tools & Performance ● AI Translation: Instantly convert global web pages into your native language. ● Ad Blocker: Automatically remove intrusive pop-ups for a cleaner, faster experience. ● Data Saving: Advanced compression tech loads pages instantly while saving your mobile data. All-in-One Solution UC Browser redefines smart navigation by combining high-speed searching, security, and premium entertainment into one powerful app. Membership Perks (Optional) UC Drive & UC VPN – Monthly subscription with 24/7 instant cancellation No hidden fees | No long-term contracts Support: [email protected] Support & Assistance For technical inquiries or feedback, please utilize the integrated support feature within the application:Open the App and navigate to Menu > Feedback. Privacy policy: https://terms.alicdn.com/legal-agreement/terms/suit_bu1_uc/suit_bu1_uc202007241608_71682.html Terms of use: http://terms.alicdn.com/legal-agreement/terms/suit_bu1_uc/suit_bu1_uc201906261439_28803.html
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 Navigation
Axios
Expo File System
React Native Gesture Handler
Redux
React Query
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.
