Smart home and connected objects are nowadays of interest in three areas: energy saving, security and comfort. Smart home aims to automate our daily lives to make life easier, especially for dependent people. A smart home system can be installed for this purpose. Apple HomeKit is one of the best platforms for different smart home systems from different brands to work together. Apple's data protection is well known and trusted by millions of people in the world. I believe smart home is a trend for next decades. People are worth better living in the confortable house, especially elders. For a homekit smart home system, i recommend the well known brand Aqara, which is much more cost-effective than other smart home manufacturers.