How to Test iOS Apps in Different Time Zones on a Physical iPhone

This article explains a practical method for testing iOS apps in different time zones on a physical iPhone, overcoming the limitations of Xcode's Simulator. It introduces RocketSim, a tool that simulates location on a physical device over USB, causing iOS to automatically update its system time zone. The workflow requires RocketSim 16.4+, Xcode 27 (beta), a physical iPhone/iPad with Developer Mode enabled, and proper settings. The article includes setup steps, examples like simulating travel from Amsterdam to New York, and a free email course offer for Swift concurrency. It is a technical tutorial relevant to iOS developers and software testing.