All apps

OkTalk

Zapps MobiTravel

On iPhone Duo

Letterboxed

OkTalk runs in an iPhone-sized window with black bars.

Want OkTalk to fill the inner display? Be the first to vote.

Its latest version is built with the iOS 15.5 SDK,[1] which Apple shows letterboxed on the inner display.[2]

How we know
From the app’s build
Checked on
Version 2.65
Build
iOS 15.5 SDK
Latest version
2.65, Feb 8, 2023
Status updated

What owners report

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Version history

  1. Version 2.65Letterboxed

    iOS 15.5 SDK

    Checked Nov 5, 2026

Sources

  1. App Store build, version 2.65

    Built with the iOS 15.5 SDK. Uses none of Apple’s iPhone Duo APIs.

  2. Apple Developer: Prepare your app for iPhone Duo