Similar to ADT home security systems, these medical alert devices connect to a 24/7 monitoring center. The company charges ongoing monthly fees for this service. The system has two primary components.

Latest News: While the holidays are over, ADT continues to offer big online discounts for its packages. Both the Security Starter and Video Essentials packages cost $199 right now, while the Front ...

Learn more about whether ADT Inc. or Frontdoor, Inc. is a better investment based on AAII's A+ Investor grades, which compare both companies' key financial metrics.