None, I use phone. Though, recently I have had thoughts about experimenting with iPad because have heard good stuff about them in performance, but current
market conditions made me invest instead of on thing that isn't really a need.
Just like you, I also don't need one and only use a cellphone to receive information and so on, but in the past I also used an iPad, but it has expired because it is no longer updated, in my opinion. In the current situation, actually it would be very helpful to have one compared to a laptop., I think that's more practical.
But everyone may not be the same and have their own preferences and that's normal.
Indeed, if you compare funds for investments like yours, it is certainly very good, but both can also be even better.