I've had a wifi camera on my mom since she had her first heart attack in 2015. She's in the kitchen at the kitchen table 85% of the day, so it's easy. It's just a simple Samsung SmartCam. It has a mobile app and I can check in on her from anywhere in the world. It has an active mic and I can hear what's going on as well as talk to her over it if she has the phone off the hook, as she occasionally does. She isn't even aware that I am checking on her, but will leave a note on the table if she's in another room. It's worked well for us and I don't have to worry quite as much.