There are quite a few things that can determine your health and your state of mind. One would be how well you are doing if you have a medical condition, your age, or if you live alone. You may think of something like a medical alert to be for someone who is elderly and may live alone or with someone else with medical problems, but there are other people who may want to have this same technology with them in their home. It is never easy to be alone and unwell, but it does give peace of mind to know that someone can come as soon as needed if something were to go wrong.
A good medical alert is going to be something that is accessible at all times. This means that no matter where you go in your home or out, you always have access to something you can trigger to get help to come. A phone is great as a medical alert, but you can not get up and call someone if you have fallen down the steps and broken a leg. You can carry a cell phone, but that is not always the best either. You could easily drop it or forget to put it in your pocket in the morning. Instead, think about other ways to be sure you are never alone, even when you are the only one in the house.
There are systems that use a medical alert right in the home security system. That means there is a simple button that you can push to alert someone that you need emergency help or that someone else should come right away. These are good, but like the phone, will not help much if you can not reach the button to push it and send for help. Often, if the button is pushed, the security company will call and if you do not answer, they will send out medical help and the police right away.
Probably the best type of medical alert for anyone of any age that is alone at home with an illness or medical condition would be the type that comes on a necklace or bracelet. These are put on in the morning and can be worn to bed if needed. When you have one of these for medical alert, you can always get to the button to push for help. You can not help yourself if you have passed out, of course, but this is a great answer in almost any other situation. The only problem is remembering to have it on you at all times, but most people get use to it rather quickly and feel safer because of it.
There is another type of medical alert that will not call someone to your home, but is just as valuable. There are bracelets and necklaces that you can wear that list any medical conditions that you may have and that medical staff would need to know about if you can not answer for yourself for any reason. These are often worn by people with diabetes, heart conditions, or those that need special medications. In the event you are incapacitated, your medical alert bracelet or necklace can do the talking for you.