I am just now getting into the GE switches. That being said, I have a couple of 12724's and they are actual dimmers and not really an on/off switch. All I can see inside the almond+ app is a Dimmer option and not an on/off? I am not too sure why this is because you can definitely turn it off but turning it on would be the trick. If you turn on the light you still need to tell the switch (because this is a dimmer) what % percentage of the light to turn on. I have 2 of the 12723's that are actually an on/off switch. These work very well.
So, all in all, from what I can see there really isn't an on/off function with the 12724's just a dimming feature. So if you want it off you need to dim to 0 and for on you need to specify that as well.
Just on a side note, you can turn on/off the dimmer but you have to manually do it from the mobile application. If you are working with Scenes or rules all you get is a dimmer selection and not an on/off.
Hope this helps.