I have a old android phone running 4.0 and I wish to know if it is possible to turn this phone into a dedicated calculator? When I say dedicated I mean - once the phone is turned on, it boots directly to a calculator GUI? Whereby the user can immediately starting using the calculator  , just like any stock standard android calculator app would look like. I do not wish it to boot to a home screen inbetween, but directly to the calculator itself. I am using a very simply example here, in anycase, would this be possible? If someone could give some further advice on this,I would happy to pay them for their time? Cheers!

I have a phone running Android 4.0 and I wish to know if it is possible to turn this phone into a dedicated calculator? When I say dedicated I mean - once the phone is turned on, it boots directly to a calculator GUI? Whereby the user can immediately starting using the calculator, just like any stock standard Android calculator app would look like. 

I do not wish it to boot to a home screen in between, but directly to the calculator itself. I am using a very simple example here, in anycase, would this be possible?