Cosmos Client
Simple. Reliable. Light.
A free VPN client that keeps your connection stable and secure. Add a profile with a link or QR code — the app keeps it up to date on its own.
no sign-up · no ads · no trackers
One app.Every device.
- iPhoneSoon
- AndroidSoon
- MacSoon
- WindowsSoon
- LinuxSoon
A client for your own server.
Cosmos Client is not a VPN provider and does not provide VPN services — you need a profile set up for your server.
VLESS + Reality
Get started
Download
For your phone and computer
2 min read · Oct 8, 2026
Add a profile
With a link or QR code
2 min read · Oct 8, 2026
Connect
First connection and status
2 min read · Oct 8, 2026
Profiles
Expiry, traffic and updates
2 min read · Oct 8, 2026
Quick access
Widget, Shortcuts, tray
1 min read · Oct 8, 2026
FAQ
If something doesn't work
3 min read · Oct 8, 2026
Server setup
Server requirements
VLESS + Reality and the config format
1 min read · Oct 8, 2026
Subscription link
Request, response and errors
1 min read · Oct 8, 2026
X-Meta header
Profile expiry, traffic and country
2 min read · Oct 8, 2026
Service info
Name, logo and links in the app
2 min read · Oct 8, 2026
Check your link
Commands and a checklist before sharing
1 min read · Oct 8, 2026