Why should I use my smartphone to trade while the laptop is just in front of me? If you say "Yes, but when you're outside?" When I am outside I have better to do and it will wait I come back home. I won't bother to use an android app to use while driving or walking, with a small screen, shit connection, or unsecured one, etc... No thanks, I don't need an IoT life cloud based!
I agree with this posture, if you trade with your android then that means that you are connected to an internet connection that is not safe, what will happen if someone intercepts your information and it is able to steal your coins? It is way better to trade only from your own home where you know that no one is going to intercept your Internet traffic than to run the risk of losing everything just because you could not wait a few minutes to get to your home.