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
Best VPN : Unlimited VPN Proxy
Best VPN - Unlimited VPN Proxy: Your Privacy Companion
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.6
122,098 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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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 Best VPN : Unlimited VPN Proxy: map the core Productivity 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 a reconnect feature that automatically attempts to reconnect.
Assumption to check: Frequent connection drops
Validate with people who use this workflow before building.
Hypothesis 2
Expand server locations and provide a map view.
Assumption to check: Limited server locations
Validate with people who use this workflow before building.
Hypothesis 3
Incorporate an in-app chat support feature.
Assumption to check: Slow customer support
Validate with people who use this workflow before building.
Hypothesis 4
Simplify subscription management and provide clear upgrade/downgrade options.
Assumption to check: Complicated subscription management
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
Best VPN - Unlimited VPN Proxy: Your Privacy Companion Protect your privacy, secure your connection, and surf the internet freely with Best VPN. No sign ups. No logins. One tap to secure. Whether you are on public Wi Fi or traveling abroad, enjoy fast, private, and unlimited access online. Why Choose Best VPN ? • Instant protection with one tap connection.No account or registration required. • True anonymity with no tracking, no recording, and no logs of your browsing activity. • Reliable high speed servers worldwide for smooth browsing and streaming. • Safe on public Wi Fi, airport hotspots, and coffee shops with full data encryption. Free Features: • Secure your connection with essential protection. • Automatic connection to the nearest secure server. • Network tools to check speed and IP address. Premium Features: • Access servers across USA, UK, Japan, Germany, and more global locations. • Unlimited bandwidth with no restrictions. • Ad blocker to remove intrusive ads and trackers. • Streaming boost optimized for HD video, gaming, and downloads. • Encrypted DNS for stronger security and privacy. • Extra protection against apps that track location or data. • Auto connect for always on protection. Frequently Asked Questions: — Is Best VPN free? Yes, the essential features are free. Premium offers faster speeds, ad blocking, unlimited bandwidth, and more global servers. — Will it drain my battery? No, Best VPN is optimized for iOS with minimal battery impact. — How can I check if VPN is working? Use the built in diagnostics to check IP address, server status, and connection speed. — Can it protect me on public Wi Fi? Yes, your data is encrypted across public and private networks. — Do you log my activity? No, Best VPN follows a strict no log policy. — Why upgrade to Premium? Premium unlocks global servers, faster streaming, unlimited use, and ad blocking for the best experience. About Us: Best VPN is developed by Open VPN LLC, trusted by over 80 million users worldwide. We focus on privacy, speed, and simplicity for everyone. Subscription Info: • Charges are made upon purchase confirmation. • Auto-renewal unless turned off 24 hours before the end of the period. • Manage your subscription in Account Settings. Privacy Policy: thevpnapp.com/privacy-policy Terms of Use: thevpnapp.com/terms-of-use Support: [email protected]
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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
React Native
Expo
Supabase
React Navigation
Axios
React Native Device Info
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.
