Completely free and open source (MIT). The code lives on GitHub — use and contribute freely.

Clash YAML, V2Ray Base64, SIP008, plus single-node links like ss / vmess / vless / trojan / hysteria2 / tuic.

Skylark is built on the sing-box core, focused on a lightweight, native-title-bar, frosted-glass UI with a visual routing-rule editor.

No. Skylark is a purely local client and never uploads your subscriptions, nodes or traffic.

Settings include a built-in update check — download and switch core versions in one click.

Please comply with the laws and regulations of your region when using this software.