Magical Book:

Endless pages, mentally linked to show you the spell you're looking for.

Appears to you wherever you are, at your will, floating around you even.

It comes with a materializable magical entity, customizable to your will.

Advanced Watch:

Infinite data capacity, neural connection to create formulas for what you want.

Auto teleport through the neural link, appearing around your wrist from where you left off.

It comes with a materializable digital entity, customizable at will.

I love both of them

Magic book. The magical entity has a neutral stance that materialises itself as a demon and angel to sit on my shoulders giving me advice on good things I could do or bad things I could do

Both do this.

I ilke both of them