MobileHelp typically allows one primary account holder per service plan. However, the account can support multiple users in terms of devices or alerts. When setting up an account, the main user is registered and can manage their emergency response system through that account. The MobileHelp system is designed to cater to individual needs, so while a family member or caregiver can assist, the service primarily focuses on providing personalized support for each individual user. To find more detailed information about specific plans and user limits, it is advisable to visit the official MobileHelp website. That will provide the most accurate and up-to-date information regarding account setups and capabilities.