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 360 Unlimited
Enhance your online safety and privacy with Fast VPN 360
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.5
930 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'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 VPN - Fast VPN 360 Unlimited: 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
Implement a more robust server selection and connection logic.
Assumption to check: Users often find connection reliability issues.
Validate with people who use this workflow before building.
Hypothesis 2
Provide a more generous free trial with essential features.
Assumption to check: Limited free trial features frustrate users.
Validate with people who use this workflow before building.
Hypothesis 3
Simplify subscription options and provide clear benefits.
Assumption to check: In-app purchases can be confusing.
Validate with people who use this workflow before building.
Hypothesis 4
Enhance transparency about data usage and provide clear privacy policies.
Assumption to check: Privacy concerns with data logging.
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
Enhance your online safety and privacy with Fast VPN 360. Our app provides a robust and reliable virtual private network service, designed to protect your digital footprint. Whether you're Browse, streaming, or working, Fast VPN 360 ensures your data remains secure and your activities stay private. Key Features: - Advanced Encryption: Safeguard your sensitive information with industry-standard encryption protocols. Fast VPN 360 creates a secure tunnel for your data, shielding it from prying eyes on public Wi-Fi and unsecured networks. - Enhanced Privacy: Mask your IP address and browse anonymously. Maintain your online privacy and prevent third parties from tracking your digital movements. - Stable & Fast Connections: Experience smooth and uninterrupted internet usage. Our optimized network infrastructure ensures consistent performance for all your online tasks. - Intuitive Interface: Connect with a single tap. Fast VPN 360 is designed for ease of use, making secure Browse accessible to everyone. - Reliable Performance: Enjoy a dependable connection that protects your data integrity. Our commitment to quality ensures a consistent and secure experience. - 24/7 Support: Have questions? Our dedicated support team is available around the clock to assist you. How Fast VPN 360 Works: Fast VPN 360 establishes a secure connection between your device and our servers. This process encrypts your internet traffic, protecting your data from unauthorized access and ensuring a private Browse experience. Your online activities become significantly more secure, especially when using public Wi-Fi hotspots. Protect your digital life today with Fast VPN 360 – your trusted partner for online security.
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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.
