This is mainly due to buttons that are slightly smaller than those on competitor systems. (dagersystem.com)
One of the goals was to eliminate the need that many safety systems have for a base station (such as competitor system Lifeline by Philips)-- Amulyte instead connects to an app, accessible on smartphones and tablets, that allows family members to see how active the wearer is, where they are, and even the pendant's battery levels. (canadianbusiness.com)
It seems that as Apple Pay and similar competitor systems gain momentum, such functionality would become more feasible since as you say it already generates an email receipt, so it would be a matter of including an itemized list into the receipt rather than just the total. (money.stackexchange.com)