I’m using an iPhone SE.  The screen is too small   What is the best screen to use?  Would an iPad work?  

Hi there. Thank you for reaching out. Hope that you could get the best recommendation from our fellow DJI pilots here in DJI Forum. You may also want to check the recommended mobile devices for the DJI Fly application using the image below. Thank you for your support!  

iPads work but will need an adapter to hold in the mount, or the iPhone 12 Pro Max works great.