Does VPN by Private Internet Access work on iPhone Duo?

Yes. VPN by Private Internet Access is updated for iPhone Duo and uses the full inner display. Its latest version is built with the iOS 27.1 SDK and uses Apple’s iPhone Duo APIs.

Is VPN by Private Internet Access letterboxed on iPhone Duo?

No. VPN by Private Internet Access fills the inner display.

All apps

VPN by Private Internet Access

Name: VPN by Private Internet Access
Author: Private Internet Access, Inc.

Private Internet Access, Inc.Productivity

View in the App Store

On iPhone Duo

Fits

VPN by Private Internet Access fills the inner screen and adapts when you fold.

Its latest version is built with the iOS 27.1 SDK and uses Apple’s iPhone Duo APIs.[1]

How we know: From the app’s build
Checked on: Version 3.37.2
Build: iOS 27.1 SDK
uses Apple’s iPhone Duo APIs
Latest version: 3.37.2, Oct 13, 2026
Status updated: Oct 29, 2026

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Version history

Version 3.37.2Fits
iOS 27.1 SDK
Checked Oct 29, 2026

Sources

App Store build, version 3.37.2
Built with the iOS 27.1 SDK. Uses UIView.reservedRegions.
App Store: VPN by Private Internet Access 3.37.2 release notes