MIO (MIO Global…the Link/Velo/Alpha/Fuse people) have a new activity tracker and associated app.
They have a new HR/activity index to base their interpretation of your advice on – called PAI. I’m not sure if this is the same good-old MIO sensor that is on the LINK and the one used on the Garmin 225 – I would imagine it is.
From the images you can see it purports to have smartphone notifications.
So I suppose this will turn out to be a new and improved FUSE.