Note: As a safety disclaimer, I have included warnings about downloading old APK versions from third-party sites, as this is a critical security concern for VPN software.

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1) Verifica compatibilidad

• Sistema operativo: Windows, macOS, Android o iOS. Confirma que tu sistema cumple los requisitos mínimos del cliente Proton VPN.

2.3 Malware Risk

When you download an old version from unofficial sources, you risk downloading a repackaged client with:

The latest version of Proton VPN, 3.4.3, comes with several features that make it a popular choice among VPN users:

iOS:

4. Recommended Alternative

• Download the latest Proton VPN from protonvpn.com/download.
• For older OSes (e.g., Windows 7, macOS 10.13), use the latest version that still supports them, not 3.4.3 specifically.