There are many clients on the V2Ray / Xray core, but each platform really has one or two safe picks.
Windows
Go with v2rayN — most complete, biggest community, most guides. Want a more modern UI? Look at Furious. Prefer the sing-box ecosystem? Try NekoRay's successor fork.
SponsoredWhere does the subscription link come from?Our partner provider gives you 1 GB of high-speed Hong Kong data at signup — import it in one click.Get high-speed nodesAndroid
Go with v2rayNG — same author as v2rayN, compatible subscriptions. sing-box-based clients are also an option with fresher protocol support.
macOS
For a light menu-bar app, V2rayU; for a v2rayN-consistent experience, v2rayN has a macOS build too; on the App Store, V2Box is free and easy.
iOS
Limited by the store, mostly paid or needing a foreign account. Common choices: Shadowrocket (paid, well-established), V2Box (free), Stash and others — all compatible with VLESS / VMess / Trojan.
Common thread across platforms: choose an actively maintained, open-source or well-regarded client and download from official channels. Full maintenance status is in the ecosystem list on the home page.