VPN "Uncle Vanya's" is the same VPN you need.

ShadowSocks VPN client with the ability to add keys using a QR code.

We use VpnService to achieve our main goal: ensuring your security and privacy online. VpnService is an integral component that allows us to create a secure, encrypted connection between your device and our remote servers. This technology is fundamental to the core functionality of our VPN as it creates a virtual private network (VPN) tunnel that protects your online activity from prying eyes.
The core functionality of our application is related to online security and privacy, and VpnService is the key component that makes this possible. We are committed to providing you with the highest level of online protection while complying with all Google Play Store policies.