I think a 'reminder gadget' is a great idea. It's good to know that there is an option for the bracelet to vibrate for those who are hard of hearing or who are losing/lost their sight. You could explore to see if you can add some lights to the bracelet so that it lights up as well. My grandmother is in her nineties but still very stylish. She refuses to wear an alert button around her neck because she think it looks unattractive. Maybe you can come up with some interesting bracelet designs for those stylish adults!
I'd like to know more about the battery on the bracelet and device that connects to the mobility aid. How long will it last? Does the bracelet need to be charged?