Base - The base plan offers GPS location, VIN, Driver ID, and basic IOX support.
HOS - The HOS plan adds Hours of Service functionality over the Base plan. It is geared to fleets that are primarily concerned about HOS compliance.
PRO - The Pro plan offers the functionality of the HOS plan and adds support for engine and accelerometer data.
ProPlus - The ProPlus plan offers the greatest functionality, including Active Tracking, a lifetime warranty, and premium services.