AGN INJECTOR: Engineering an Ethical Android VPN Using Kotlin, Java & MVVM

May 1, 2025 · By Khaled AGN · ⏱️ 2 min read
AGN INJECTOR: Engineering an Ethical Android VPN Using Kotlin, Java & MVVM

AGN INJECTOR started with frustration. Not with firewalls or censorship, but with the hypocrisy of so-called privacy apps that track users in the background. I didn’t set out to compete with big-name VPNs. I just wanted something honest.

Most of the features I needed already existed in open-source form, V2Ray for routing, Hysteria for speed, SlowDNS for restrictions. The real work was in unifying these technologies into a stable mobile experience.

I built the app in Kotlin and Java using the MVVM architecture. This wasn’t just for code cleanliness, it was a necessity. With protocols so varied and edge cases so obscure, the architecture had to enforce separation. The ViewModel layer handles state, while tunneling logic is tucked into isolated service classes. We use LiveData and StateFlow to keep everything reactive.

What makes AGN INJECTOR special isn’t just the stack. It’s the stance. There are no ads, no trackers, and no exceptions. Every update goes through a privacy audit. Network activity is transparent. Users never have to question what’s happening behind the scenes.

We’ve learned a lot since launch. Carrier-grade NAT detection is a real pain. Android aggressively kills background services if you don’t handle wake locks properly. And SlowDNS? It’s still a mystery to new users until they try it in a censored network and it just works.

Despite the technical complexity, user feedback always centers on one thing: trust. People don’t write reviews about protocol stacks. They talk about how the app made them feel safe, respected, in control.

With over 90,000 installs, AGN INJECTOR is still growing. We’re working on decentralized exit nodes, exploring post-quantum cryptography, and integrating more subtle protocol fallbacks. But the mission hasn’t changed: make privacy tools that feel human, not corporate.

We didn’t build a VPN. We built a statement.

App Reference
  • Play Store Url: https://play.google.com/store/apps/details?id=com.agn.injector
  • Key Features:
    • V2Ray integration for advanced routing
    • UDP Hysteria protocol for high-speed transfers
    • SSH WS tunneling for stealth connections
    • SlowDNS technology for restrictive networks
    • Zero advertisements or trackers
    • 90,000+ organic installs
  • Technical Components:
    • Combination of 12+ open-source projects
    • No-root-required architecture
    • MVVM Architecture
    • Kotlin/Java
    • Multi-protocol support in single engine
    • Cloud config synchronization
    • Dark mode UX for extended use
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