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FlClash vs Happ: catalog facts
FlClash	Happ
Free Free, open source and ad-free.	Free Free to download, with optional donations to the developer.
Windows, macOS, Linux, Android	Windows, macOS, Linux, Android, iOS
One client across Android and desktop systems Based on the Clash Meta core	Supports VLESS Reality, VMess, Trojan, Shadowsocks and SOCKS Rule-based routing between proxies
Needs a proxy subscription or server to be useful Documentation leans towards users already familiar with Clash	A client only; you need proxy servers from elsewhere Source code not published
Downloadable app	Downloadable app
Open source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.