Proton VPN is a prominent VPN provider known for its speed and security, with its headquarters in Switzerland, which has strong privacy laws. The Android app features include Secure Core for enhanced anonymity, NetShield Ad-blocker to block ads and trackers, a kill switch to protect data during connection drops, alternative routing for bypassing restrictions, split tunneling for selective app usage, a VPN Accelerator for increased speeds, and P2P support for secure file sharing. The app requires Android 8 or later for installation, which can be done via the Play Store. Users can connect as guests to access limited features of Proton VPN Free.