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 Lumos: Open & Connect USA
VPN Lumos offers you a fast, private and secure internet connection
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.5
37,273 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/
Preview a sample Build Kit No email needed
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 Lumos: Open & Connect USA: 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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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
VPN Lumos offers you a fast, private and secure internet connection. Change your IP address, access social networks, streaming, watch TV, browse movie websites, play games and more without limits! ◾Enjoy streaming services: Netflix, Disney+, Hulu, Max, Amazon Prime, Apple TV, Youtube ◾Make messenger calls ◾Connect to TikTok, Twitter, other social media ◾Secure browsing activity ◾More than 1000 servers in 45+ countries worldwide ◾Data privacy protection ◾Fastest VPN server feature ◾Safety on public Wi-Fi ◾Compatible across multiple remote devices ◾Wide language selection ◾Up to date VPN protocols (OpenVPN, Thestral, Wireguard) ◾Free trial period and an affordable subscription price ◾User-friendly interface ◾Customer support (ask us anything through email [email protected] or through an app) ◾Strict privacy policy Try VPN Lumos today and light up your online world! Subscription Pricing, Policy & Terms of Use: - VPN Lumos offers a monthly subscription plan at $11.99/mo with a 3-day free trial period. - Subscription automatically renews unless auto-renew is turned off at least 24 - hours before the end of the current period. - payment will be charged to iTunes Account at confirmation of purchase. - Account will be charged for renewal within 24-hours prior to the end of the current period. - No cancellation of the current subscription is allowed during the active subscription period. - Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase. - Any unused portion of a free trial period will be forfeited when the user purchases a subscription. Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's iTunes Account Settings after purchase. Subscription can be canceled during its free trial period via the subscription setting through your iTunes account. This must be done 24 hours before the end of the subscription period to avoid being charged. Privacy Policy: https://lumos.mobi/policy/onionvpn-policy.html EULA: https://lumos.mobi/eula/termsofuse.html
Written user reviews are not shown here. Check current App Store reviews >
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
Offer more server locations in future updates.
Assumption to check: Limited server locations compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Implement more reliable connection protocols.
Assumption to check: Occasional connection drops
Validate with people who use this workflow before building.
Hypothesis 3
Create a more user-friendly subscription management interface.
Assumption to check: Difficulties with subscription management
Validate with people who use this workflow before building.
Hypothesis 4
Add in-app customer support chat.
Assumption to check: Limited customer support features
Validate with people who use this workflow before building.
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
axios
react-navigation
expo-network
zustand
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.
