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
VPN - Fast VPN 2026
Secure VPN - Fast, Secure, Private
Free
PRICE
Free
No in-app purchases
BUSINESS MODEL
Free
No overall Grossing estimate available
RATING
★ 4.2
3,236 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 included16 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 VPN - Fast VPN 2026: 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 server selection based on user location and speed.
Assumption to check: Connection speed can be inconsistent.
Validate with people who use this workflow before building.
Hypothesis 2
Expand server options and locations for better connectivity.
Assumption to check: Limited server locations.
Validate with people who use this workflow before building.
Hypothesis 3
Enhance UI design with modern elements and user-friendly features.
Assumption to check: User interface is basic and not visually appealing.
Validate with people who use this workflow before building.
Hypothesis 4
Provide detailed analytics on data consumption in a visually appealing format.
Assumption to check: No clear information about data usage.
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
Secure VPN - Fast, Secure, Private Protect your online privacy with Secure VPN, a premium VPN service that provides secure, fast, and reliable internet connections. Military-grade encryption ensures your data stays private, while our global server network delivers lightning-fast speeds. KEY FEATURES: Advanced Encryption Military-grade encryption protocols protect all your internet traffic from hackers and surveillance. High-Speed Connections Optimized servers ensure minimal latency and maximum performance for streaming, browsing, and more. Global Server Network Access content from anywhere with servers located worldwide. Security Features • DNS Leak Protection • Security Threat Scanning • Network Diagnostics • Connection Optimization Smart Management • Auto-Connect on untrusted networks • WiFi Protection • Server Recommendations • Connection History No-Logs Policy We don't track, monitor, or store your online activities or personal information. EASY TO USE Connect with a single tap. Our intuitive interface makes it easy for anyone to protect their privacy. Perfect for remote work, secure browsing, accessing geo-restricted content, and protecting your privacy on public Wi-Fi. Download now and take control of your online privacy. Privacy Policy https://linkoravpn.xyz/p.html Terms of Use https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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
Redux
Axios
React Navigation
TypeScript
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.
