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
ShadowVPN - Fast Proxy
ShadowVPN is a minimal, fast, point-to-point VPN client built on the ShadowVPN protocol — a UDP, pre-shared-key, layer-3 tunnel using the shadowsocks AEAD encryption scheme.
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 ShadowVPN - Fast Proxy: 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 reconnect feature that automatically attempts to reconnect.
Assumption to check: Users often experience connection drops.
Validate with people who use this workflow before building.
Hypothesis 2
Expand server locations and allow users to request new servers.
Assumption to check: Limited server options.
Validate with people who use this workflow before building.
Hypothesis 3
Simplify settings with a guided setup for new users.
Assumption to check: Confusing settings layout.
Validate with people who use this workflow before building.
Hypothesis 4
Add a speed test feature to show current performance.
Assumption to check: Lack of performance stats.
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
ShadowVPN is a minimal, fast, point-to-point VPN client built on the ShadowVPN protocol — a UDP, pre-shared-key, layer-3 tunnel using the shadowsocks AEAD encryption scheme. You bring your own server; ShadowVPN connects to it. Nothing is proxied through us, and there is no account to create. Follow the link to build your own server: https://github.com/madeye/shadowvpn FEATURES • Fast UDP tunnel — a lightweight raw-IP data plane with no SOCKS layer or userland TCP stack overhead. • Strong encryption — shadowsocks AEAD ciphers protect every datagram. • Split tunneling — route only what you need and bypass traffic by country using an on-device GeoIP database. • Multiple profiles — store and switch between several servers. • Traffic obfuscation — optional obfuscation to blend in with ordinary traffic. • On-device only — your keys and configuration never leave your device. • Native & efficient — a SwiftUI app driving Apple's Network Extension, with a compact Rust core for the data plane. ShadowVPN is for users who want a simple, transparent, self-hosted VPN.
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
axios
react-navigation
react-native-async-storage
expo-network
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.
