Encrypted email service provider ProtonMail has launched a standalone virtual private network app for iOS devices. With iOS now added to its list, ProtonMail said it now offers protection for the most popular operating systems, which include Windows, MacOS, Linux and Android.

VPN functionality is prevalent in enterprise security products and management products, according to Phil Hochmuth, program director for IDC's Enterprise Mobility team. At the same time, consumers are increasingly looking at VPN services to shield their online activities on wired networks, as well as on LTE/4G connections, he said.

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