Fits Duo
Submit your app
All apps

Jフェス

rockin'on holdings inc.Music

View in the App Store
On iPhone Duo

Letterboxed

Jフェス runs in an iPhone-sized window with black bars.

Want Jフェス to fill the inner display? Be the first to ask.

Its latest version is built with the iOS 26.5 SDK,[1] which Apple shows letterboxed on the inner display.[2]

How we know
From the app’s build
Checked on
Version 33.1.0
Build
iOS 26.5 SDK
Latest version
33.1.0, Sep 3, 2026
Status updated

What owners report

No reports from owners yet. Add yours

Version history

  1. Version 33.1.0Letterboxed

    iOS 26.5 SDK

    Checked Oct 29, 2026

Sources

  1. App Store build, version 33.1.0

    Built with the iOS 26.5 SDK. Uses none of Apple’s iPhone Duo APIs.

  2. Apple Developer: Prepare your app for iPhone Duo
See all 257