Nullz and coc

Can we use both app in 1 device?
If we use it , we will ban or not?

Nope. You will not get banned there is no risk, unless you tell supercell that you have a private server (PS) of one of its game it can then ban you, you stay unknown if u don’t tell, supercell, you can have normal and nulls clash on one device and it is 100% safe no risks of getting banned, so ye.

Thank you so much