Should I buy my Grandma a life alert button?

My Grandma is my best friend. In a few weeks, she'll be living by herself. My SO and I are moving out to another county with my Dad, out by the beach. A good hour or so away from her. My uncle used to live with her but also moved away to the beach. My Aunt lives in another state. I worry about my Grandma being alone in her house because there's always been someone around to help her with her yard and her car and the house. It keeps me up at night worrying about if something would happen to her and nobody could help her because we don't live there anymore. I told her I wanted to buy her one but she laughed it off and told me she doesn't need one. She's 73 and I just worry because things happen and I'd never forgive myself if it did. I just don't even know if she'd wear it if I did get it for her. Is there anything similar I can get in case something were to happen???