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 - Best VPN Proxy Master PT
free vpn for iphone
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
18,369 ratings · Top 5%
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 included14 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 - Best VPN Proxy Master PT: map the core Reference 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 protocol.
Assumption to check: Frequent connection drops
Validate with people who use this workflow before building.
Hypothesis 2
Provide more free server choices for users.
Assumption to check: Limited free server options
Validate with people who use this workflow before building.
Hypothesis 3
Optimize server performance for free users.
Assumption to check: Slow speeds on free plan
Validate with people who use this workflow before building.
Hypothesis 4
Simplify subscription options and enhance user education.
Assumption to check: Confusing subscription tiers
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
free vpn for iphone 免费vpn - vpn free unlimited 奔腾vpn - best vpn proxy master pt vpn is a free vpn for ios, mac, !! this software provides professional and effective vpn services. features: - unlimited time, unlimited data, unlimited bandwidth. - no registration or login required. - no log is saved from any users. - simple, one tap connect to vpn. - protect your security and privacy. - update server at any time to ensure your smooth experience. what can i do with a vpn? - enhance your online privacy and enable you to safely and anonymously browse the internet. - protect you when using a public wifi hotspot. - protect user privacy on public or insecure networks. legal: please see pt's "terms of services" and "privacy policy": terms of service: - https://mcmobile.net/mcpt/termsofservice.html privacy policy: - https://mcmobile.net/mcpt/privacypolicy.html
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
Redux
Axios
react-navigation
react-native-vector-icons
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.
