DarkViper uses it Toriks does not use it
And I see no difference when I compare their runs
What is the advantage of iFruit during a run?
I used the example with these two people, because they are about the same level. And their time is much closer to each other. But one does what the other does not do
You're not guaranteed to save time with it, it also depends on how well you drive and if you crash etc.
IIRC, Toriks doesn't use the app because he simply prefers not using it. It's more of a preference than a huge strat to save lot of time I guess
The ifruit app saves time but not so much that new runners should worry about it. The ifruit app is not hard to use, it seems specifically designed to be easy to use. Most of the upgrades, at least the significant ones, are done when you are stationary and doing nothing else e.g prologue cutscene, friend request tv scene, water tower with trevor etc.