Most email marketing platforms offer analytics that show how your emails perform across different devices. You can measure device dependence by looking at metrics such as:
Open Rates: Compare the open rates for emails viewed on mobile versus desktop. Click-Through Rates (CTR): Assess the CTR for different devices to understand where users are more engaged. Conversion Rates: Track how many users complete a desired action (like making a purchase) from each device type.
Understanding these metrics will help you tailor your campaigns for different devices.