About V2Duo
An app that lets you use all the internet you already have, built by a small independent team.
V2Duo started with a simple annoyance: our phones had Wi-Fi and mobile data at the same time but used only one of them. When Wi-Fi was slow, mobile data sat idle, and when a config stopped working, we had to hunt for another by hand. We built V2Duo so both of those things happen on their own.
What we build
V2Duo is a client for V2Ray and Xray configs, made for Android and Windows, that can use several internet links together. We do not sell servers or configs; you use it with your own configs or with none at all. Every feature is free, and the subscription only removes ads.
Principles we stick to
- No accounts: you need no personal details to use the app or to buy a subscription.
- Honesty about speed: combining links does not magically double your speed, and we say so everywhere, even inside the app.
- Staying light: an app that is always on in the background should not eat your battery or CPU.
- You stay in control: configs stay encrypted on your own device and are never sent to our server.
How we test
Before release, every version of V2Duo goes through a set of automated tests that run on a real Windows system with real traffic:
- Real traffic through the tunnel: downloads from several servers, through the tunnel and over several network adapters, checking that traffic really is spread across the paths.
- Resource use: CPU, memory and thread count are measured when idle and under load. If they go over the limits, the version does not ship.
- Connect and disconnect: how the app behaves when configs change, when settings change while connected and when the connection drops.
- DNS: with a deliberately broken DNS server we check that no address resolves by another route, which means DNS does not leak.
- Config import: every link format, plus Clash and sing-box files, is tested with real samples, and every config must be accepted by the Xray core itself.
The numbers you see on this site, such as CPU and memory use, come from these tests. The Speed lab inside the app uses the same method, so you can see the result on your own internet.
Who writes the guides?
The guides on this site are written by the V2Duo team, based on those tests and daily use. Each guide is updated when the app changes, and the date of the last update is shown at the top. If you spot a mistake, tell us through support.
Contact
For support and suggestions, use the support form. For advertising, see the advertising page. We answer every message.