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
Sky VPN - Super VPN Master
Enjoy a fast, secure, and private browsing experience with Sky VPN—the perfect tool to protect your iPhone and iPad's internet connection.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.4
1,005 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.
Build your own version
Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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Combine features and design from your favorite apps.
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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 Sky VPN - Super VPN Master: 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
Provide more free features or usage time.
Assumption to check: Limited free usage before paywall
Validate with people who use this workflow before building.
Hypothesis 2
Optimize server selection and connection algorithms.
Assumption to check: Connection speed can be slow
Validate with people who use this workflow before building.
Hypothesis 3
Simplify navigation and improve clarity.
Assumption to check: User interface can be confusing
Validate with people who use this workflow before building.
Hypothesis 4
Expand server network for better global coverage.
Assumption to check: Limited server locations
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
Enjoy a fast, secure, and private browsing experience with Sky VPN—the perfect tool to protect your iPhone and iPad's internet connection. Sky VPN is your reliable partner for maintaining online privacy and protecting data security, suitable for any network environment. Whether you're using public Wi-Fi or browsing at home, Sky VPN provides strong encryption and a smooth connection with just one click. ■ Why Choose Sky VPN? Advanced Encryption: Protect your data with military-grade 256-bit encryption No Registration Required: Start using immediately, no account creation required Unlimited Use: No session time or bandwidth limits WiFi Protection: Stay safe on public and shared networks Privacy Design: Your IP address is hidden, and your internet traffic is encrypted Premium Features (via in-app purchase): High-Speed Access: Connect to our enhanced 10G server routing for optimal performance Ad-Free Interface: Enjoy a smooth, clean VPN experience Priority Assistance: Get faster support when you need help ■ Sky VPN Features: Encrypt your connection for secure browsing Enhanced privacy when using public or insecure networks Protect your online activities through a private and secure channel Use Sky VPN on all your Apple devices with a single installation ■ Optimized for Mobile Devices Improved stability and connection smoothness for apps and online services, especially for real-time mobile interaction. Premium plans are recommended for optimal performance. ■ Premium Package Includes (In-App Purchase): Unlimited Connection Time Access to Servers in Multiple Regions Secure Encryption Standards No Login or Registration Required Access to 10G High-Speed Servers Dedicated Support Channels Subscription Options: 1 Month: $12.99 6 Months: $39.99 12 Months: $59.99 ■ Supported Protocols Automatic Mode (Recommended): Smart protocol switching for optimal connection Manual Options: Choose from modern protocols including Secure, Turbo, or Stable (for advanced users) ■ Privacy Commitment Sky VPN strictly adheres to a zero-logs policy. We never store or track your browsing history, personal IP address, or usage details. Your privacy is our top priority. ■ Legal & Support Privacy Policy: https://skyvpn-ddcac.web.app/Privacy.html Terms of Use: https://skyvpn-ddcac.web.app/Terms.html Download Sky VPN now—your safe, private, and smooth internet browsing partner.
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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.
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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.
