First off sorry if this was already a post
I play kerbal on my PS4 as I dont own a computer. Ive been wanting to be able to calculate delta v to really be able to thuroughly enjoy designing my rockets, but I dislike doing the math and the PS4 doesnt support mods....... then i found this app! Its called KSP DeltaV. It allows you to not only plan your mission (giving deltav costs for each leg, i.e. Cost to orbit kerbin, cost to transfer ,etc, but you can also build your rocket in the app (you select the parts you used and apply the correct quantity, and you get the total Delta V, no math! You can also get seperate Delta V amounts for each seperate stage! I believe the app cost like 1.99 or less.