The FPS must be shown on screen now to prevent cheating. For example, someone could cap the game at 70 FPS and it wouldn't be easy to notice, but would still speed up the gameplay slightly. You can turn on capped FPS through steam settings, and even through DxTory settings.

Speaking of which, DxTory is a great way to cap framerate. Look it up. It's free.

Also, the pip-boy app is banned from use in runs. There are too many variables for it to be used by everyone, and it is unreliable with connecting:

-Reliable Internet is needed for it, and should never have to be needed for speedrunning unless the category is multiplayer related. -It forces competition to invest in a tablet or smartphone, and compared to the Tingle Tuner in The Wind Waker speedruns, those are much more expensive. -The wireless internet needs to match the network of your wired internet, and in many cases there can only be one PC with Fallout in the network for the connection to work.