I’m not expecting much. I just wish it would work consistently. I don’t know how many times it’s just decided to crash or turn off or fail to wake. It’s never even been reliable as a simple watch like what you mention. At least not for me. But, it’s been fun to play with for a small fee.
From quick research, it certainly seems to be the preferred alternative. It’s been around for quite awhile and look to have a legit business model. I also found an open source app that looks decent.
AnymeX