Smart locks can be opened and closed using a mobile app and will send a notification when someone locks or unlocks a door, and most allow you to create permanent and temporary access schedules for family members and friends based on specific hours of the day and days of the week. Features to look for include
geofencing, which uses your phone's location services to lock and unlock the door, voice activation using Siri
HomeKit, Google Assistant, or Amazon Alexa voice commands, support for IFTTT, and integration with other smart home devices such as video doorbells, outdoor cameras, thermostats, smoke alarms, and connected lighting. Best Smart Home Security Systems Featured in This Roundup:ADT Pulse ReviewMSRP: $28. 99 at Pros: Fast and knowledgeable service reps. Many components available. Support for third party devices. Solid mobile and web apps. Cons: Expensive. Requires three year contract with hefty termination penalty. Some Pulse peripherals require third party mobile apps. Bottom Line: ADT Pulse offers just about everything you could want in a full service home security system, including many component options, support for popular third party smart home devices, and a solid app experience.