Open Custom is an AIO (All in One) Tunnel VPN service that offers a variety of communication protocols in a single application. Users can access different tunnel types including Secure Shell (SSH), DNS Tunnel (DNSTT/SlowDNS), V2RAY Tunnel, V2RAY DNS Tunnel, TROJAN Tunnel, SHADOWSOCKS Tunnel, UDP Tunnel, and Psiphon Tunnel.

This VPN service boasts features such as free VPN servers, custom server setup, free promo payloads, custom configurations, host checker, WiFi sharing, export and import configuration options, payload generator, identification settings, notification alerts, automatic and manual updates, radio mobile network connection, DNS and UDP changers, auto ping, data compression, CPU wakelock, and does not require root access.