I am a member of the sandwich generation, caring for my children and parent at the same time. My dad lives on his own but I need to keep close tabs on him to ensure that everything is going alright. One tool that I use is TheirCare (https://their.care), a service that is delivered via smart TV that enables me to do video calls with my dad. He can answer my call with his TV remote and just talk to me from his recliner in his living room. I can call him from my computer or smart phone and get to see him and get an idea of how well he is doing.
Recently I have become concerned that he has dropped 17 pounds in the past 6-8 weeks and has been struggling with weakness in one of his legs.