Just got one of these guys and can confirm you cannot assign the buttons to third party apps, very disappointed with this as it was the main reason I bought it, to add VPN to one button which I can, but can’t add Syncler to my second button.
Oh well, at least if I lose it I can ask Alexa to find it…lol
@conman33158 I agree with @Powerfader about button mapper. It most likely your best option and if it will not work I cant think of anything else out there. A quality device you would think allow for something like this however they prefer closed to what we think.
Hopefully a workaround will pop up sometime, I downloaded the button mapper apk file but failed to install on the fire cube. I’ll just wait a while and see what happens. Just assigned button 2 for notifications so when that stupid Music Notification pops up I can go straight to it and delete it lol