The brick app is used so Noah can keep tab on his brother in the insane asylum called "the brick".
The biot app is for Noah's personal biots so he can control them through his phone.
His peoms app is so he can look up poems by "Keats" his fake name that he had to take up in order to be in BZRK.
The games app he has is just so he can keep his mind fresh because he needs to keep his mind sharp and to think on many different levels at a time when using his biot.
The football app is just so he can keep track of the recent scores of his favorite football team in London where he's from.