macobserver reported Apple disclosed six iPhone Duo–specific APIs in a technical briefing, notably an API allowing apps to request a second window (UIWindowSceneActivation). Apple says iPhone Duo is its first iPhone to support native dual-instance apps, but the new window can open only on the inner screen, not the outer display. iOS currently does not natively allow two independent installs of the same app (e.g. two WeChat instances). Apple’s notes indicate iPhone Duo should in theory permit two

macobserver reported Apple disclosed six iPhone Duo–specific APIs in a technical briefing, notably an API allowing apps to request a second window (UIWindowSceneActivation). Apple says iPhone Duo is its first iPhone to support native dual-instance apps, but the new window can open only on the inner screen, not the outer display. iOS currently does not natively allow two independent installs of the same app (e.g. two WeChat instances). Apple’s notes indicate iPhone Duo should in theory permit two concurrent WeChat sessions with separate accounts, but practical support has not been verified.