Logo

VPN Application for Mobile Devices

Industry:
B2C / Privacy Tech
Timeline:
4.5 months
Type:
Mobile Application
Platform:
iOS, Android

A tool for secure internet access with a simple interface, fast routing, and built-in bypass mechanisms

[client]

/01

The app provides a one-tap stable VPN connection.

The focus is on speed, simplicity, and privacy. The app requires no registration: access is granted via a license key or subscription. If the connection drops, automatic traffic protection kicks in.

[project idea]

/02

The client came with a task: to create a clear, lightweight VPN app without unnecessary screens, with fast connection speed and stable performance on weak connections.

Competitors are either overloaded with settings or unreliable. The goal was to balance user-friendly UX with technical stability and create a product for mass adoption.

[our responsibility]

/03
UX design for iOS and Android
Mobile client development (Flutter)
Server-side authorization and session management
Integration with OpenVPN / WireGuard
Subscription and billing integration in app stores
Testing and publishing

[the client had]

/04
Clear business model — subscription, no freemium
List of security and protocol requirements
Requirement — no user data collection

[team]

/05
1 Product Manager
2 UX/UI Designer
3 Backend Engineer
4 Frontend Engineer
5 AI Engineer
6 QA Specialist
[tech stack]
/06
React Native
React Native
React
React
TypeScript
TypeScript
WireGuard
WireGuard
Python
Python
FastAPI
FastAPI
PostgreSQL
PostgreSQL
Redis
Redis
Docker
Docker

[key features]

/07

One-Tap Connection

Simple one-tap start

Lightweight Client

Minimal size, fast launch

Kill Switch

Automatic traffic blocking on disconnect

License Key or Subscription

No registration required

Split Tunneling

Exceptions for individual apps

Manual Region and Protocol Selection

OpenVPN and WireGuard Support

Built-in Network Status and Session Log

[development process]

/08
1 Competitor analysis and identification of weaknesses
2 Interface prototyping: fewer screens, maximum clarity
3 Building the mobile client and integrating the VPN SDK
4 Server configuration and security setup
5 Billing and license key integration
6 Testing: stability, load, and UX flows
7 Publishing and ongoing support

[technical challenges and solutions]

/09
01
Challenge

Implement permissions across three levels (role, department, entity type)

Solution

Custom ACL module with caching and flexible configuration

02
Challenge

Improve relevance of AI hints and reactions

Solution

Building an intermediate layer with enriched context — routes, roles, statuses, task parameters

03
Challenge

Prevent "stuck" tasks and implicit blockers

Solution

AI generates text comments explaining reasons, suggests actions (e.g., "To proceed, you need to...")

[results]

/10
  • use VPN daily
    > 68 %
  • Connection time — under 1 second
    84 %
  • Retention D7
    39 %
  • user support requests
    < 0.3 %
  • Refund rate in the first month
    < 1.5 %
  • Successfully passed App Store and Google Play review

    confirmed by post-implementation research