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 - Top Fast VPN
Protect your digital life with Top Fast Connect, a powerful tool that safeguards your privacy while you explore the internet.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
5,165 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 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 - Top Fast VPN: 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 stable connection management system.
Assumption to check: Frequent disconnections during use
Validate with people who use this workflow before building.
Hypothesis 2
Offer more server locations and faster connections.
Assumption to check: Limited server locations
Validate with people who use this workflow before building.
Hypothesis 3
Create a more user-friendly and straightforward UI.
Assumption to check: User interface can be confusing
Validate with people who use this workflow before building.
Hypothesis 4
Provide an ad-free experience with premium subscriptions.
Assumption to check: In-app ads can be intrusive
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
Protect your digital life with Top Fast Connect, a powerful tool that safeguards your privacy while you explore the internet. Attention: Top Fast Connect is allowed only for legal purposes: protecting connection from hackers. It is prohibited to use to access resources prohibited by law in your country. Key benefits of Top Fast Connect - Protect your privacy: Shield your browsing habits from internet service providers and advertisers. - Secure public Wi-Fi: Stay safe online. - Save money: Choose which country to purchase online services. - Unlimited data. Top Fast Connect offers peace of mind in an increasingly complex online world. Keep your data private and enjoy unrestricted internet access with confidence. Features: - Military-grade encryption - Strict no-logs policy - 24/7 customer support Experience the internet without limits – download Top Fast Connect today and take control of your online privacy. Please read our Privacy Policy at https://freefastconnect.app/privacy Check out our Terms of Service at https://freefastconnect.app/terms
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.
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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.
