It has been a while since we last checked in with AeroFS, but the company has been busy. For those of you who don't remember, AeroFS bills itself as a Dropbox-equivalent for the privacy-minded—it allows you to sync files between multiple computers, using the AeroFS servers for authentication only. All of your data stays on your computers and is encrypted in transit, eliminating the risk that a hacked server (or an inadequate privacy policy) will compromise your control over your data.

Since exiting beta last April, the company has launched a new business-focused product called the Private Cloud. Like the Hybrid Cloud, it lets your users share data between multiple systems without ever touching a central server, but it allows you to use private servers and directory systems for authentication, keeping the entire system behind your firewall and never touching AeroFS' servers. Today, the company is announcing an iOS app for Private Cloud users, the first step toward addressing a longstanding criticism of the service—that it just isn't available in all of the places that public cloud services like Dropbox or Google Drive are.

AeroFS Private Cloud users will need to download the app from the App Store, log in to their Private Cloud accounts on their computer, and scan a QR code to configure the iOS app. After that, it looks and works much like the Dropbox app for iOS—except for the part where it uses public servers to store your data.

An Android client for the AeroFS Private Cloud is "under active development" according to AeroFS CEO Yuri Sagalov, though there's no indication of when it might be available. A Windows Phone client may follow if there is sufficient demand. As for home users using the company's "Hybrid Cloud" solution, mobile apps are apparently in-work, but supporting Private Cloud users is the company's first priority.

"As a company, more and more of our demand has been coming from the Enterprise, so that's where our focus is right now," Sagalov told Ars.