mqvpn

mqvpn is an open-source multipath VPN client. It combines multiple internet
connections (Wi-Fi + cellular) for bandwidth aggregation and seamless
failover, speaking standards-based MASQUE CONNECT-IP (RFC 9484) over
Multipath QUIC — no proprietary tunnel format.

The app uses Android's VpnService to route the device's network traffic
through the tunnel; Android asks for your consent before the first
connection. Traffic goes only to the server you configure; the app contains
no analytics or telemetry. Privacy policy: https://docs.mqvpn.org/privacy

Features:

* Multipath: bond Wi-Fi and cellular, seamless failover between them
* Standards-based: MASQUE CONNECT-IP (RFC 9484) over QUIC
* Pre-shared-key auth over TLS 1.3
* Requires a self-hosted mqvpn server (see the project README)