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Zerova / Zystra VPN

A cross-platform VPN client built on a WireGuard core, with native tunnel management, multi-region server selection, and a complete privacy and rebrand lifecycle — designed, built, signed and shipped to Google Play.

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StackFlutter · Dart · Kotlin · WireGuard
PlatformsAndroid (Google Play)
TypeVPN client · rebrand lifecycle
RoleMobile engineering · publishing

The problem

The client needed a real VPN — not a wrapper around a third-party SDK, but a proper tunnel with native service integration, reliable connection state and store-compliant privacy handling. It also had to survive a full rebrand from Zerova to Zystra without breaking existing installs.

What we built

  • Native Android tunnel via VpnService with the WireGuard core, Flutter UI as a thin state reflector.
  • Full connection lifecycle — connect, disconnect, reconnect-on-network-change and a foreground notification.
  • Multi-region server selection with latency-aware defaults.
  • VPN service declaration, data-safety form and privacy policy written to match real behaviour.
  • Signing-key continuity preserved through the rebrand so Play treated the new identity as an update.

Outcome

A production VPN client delivered through the full store lifecycle, including VPN declaration, data-safety compliance and a rebrand handled without losing update continuity.

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