What apps do you use to assist in your gaming?

I have two apps that select randomly set ups for Marvel Legendary. 

A general score keeping app, along with one aimed at Epic.

Two apps that can be used to track tournaments if I ran one.

A deck building app for Android:Netrunner.

I’m tracking my game plays with an app (more in that at the end of the month).

Naturally I also have companion apps for games I own that provide timers, atmospheric sound effects, or read out event cards.

So what apps do you have to aid your gaming?