Does TacSync work on iPhone Duo?

Yes. TacSync has been 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 TacSync letterboxed on iPhone Duo?

No. TacSync fills the full inner display.

All apps

TacSync

Name: TacSync: Milsim team awareness
Author: Adomas Alenovic

Adomas AlenovicMaps

View in the App Store

On iPhone Duo

Fits

TacSync 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 1.3.1
Build: iOS 27.1 SDK
uses Apple’s iPhone Duo APIs
Latest version: 1.3.1, Nov 3, 2026
Status updated: Nov 5, 2026

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Version history

Version 1.3.1Fits
iOS 27.1 SDK
Checked Nov 5, 2026

Sources

App Store build, version 1.3.1
Built with the iOS 27.1 SDK. Uses systemTraitsAffectingVerticalBarEdge.