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
Best VPN Proxy AppVPN
appvpn features:
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.5
33,156 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 Best VPN Proxy AppVPN: map the core Productivity 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
Offer more features for free to attract users.
Assumption to check: Limited free features compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Optimize server connections for faster performance.
Assumption to check: Connection speed can be slow
Validate with people who use this workflow before building.
Hypothesis 3
Simplify onboarding process with clearer instructions.
Assumption to check: User interface may be confusing for new users
Validate with people who use this workflow before building.
Hypothesis 4
Reduce ad frequency or offer an ad-free premium option.
Assumption to check: Frequent ads during usage
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
appvpn features: - simple, one tap connect to vpn - free setup, no registration and no any log kept！ - never track,log,or store any user personally identifiable information - no data transfer limitations - protect your security and privacy appvpn function: - keep your mobile activities safe & private. - protect your online privacy when using the internet in potentially unsafe locations, such as unprotected wifi hotspots in hotels or cafes. - appvpn provides a safe and trustworthy connection by configuring an secure channel between your ios and the target website using virtual private network (vpn) technology. - appvpn uses reliable servers located in usa, united kingdom, germany, japan, canada, taiwan, hong kong, singapore, brazil, russia, india, australia, turkey, israel, luxembourg, france, south korea, south africa and mexico notes on our auto-renewing subscriptions - dedicated servers for subscriber. - our "monthly-subscription" subscription can be ordered monthly($7.99)! - our "yearly-subscription" subscription can be ordered yearly(us$49.99)! - your itunes account will be charged for subscription renewal within 24-hours prior to the end of the current period. - you can turn off the auto-renew (via your app store settings page) at any time (24-hours before the end of the current period), but no cancellation for the current subscription period. - check out our privacy policy and terms of use: privacy policy: https://www.wcomes.com/privacy_policy_vpn.html terms of use: https://www.wcomes.com/terms_of_use.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
Axios
React Navigation
Redux
Expo Location
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.
