Do I need a need a cellular data plan for my iPad?

If you are a care coordinator working from your home or an office that has access to the internet via Wi-Fi or an Ethernet cable, you do not need a cellular data plan. However, for a mobile technician or a veterinarian, it is highly advisable. Without access to the internet you will be able to use REX, though the REX offline feature is designed to be used for short periods of time. In the offline mode, REX is unable to sync between the devices used by other users in your practice.