This app was mentioned in 8 comments, with an average of 6.25 upvotes
Looks good, but how does it work since stats appear multiple times? For example, 4 speed may appear 3 times before reaching 5?
There are a few apps that help too: https://play.google.com/store/apps/details?id=com.ViktorDikov.BetrayalCharacterStats&hl=en
I hear this problem more often, but my copy doesn't have this problem fortunately. They fit pretty well.
There are apps available so you can keep track on there, like this one
I've used this one for Android.
And then there is this other one for iPhones, but I don't have one so I can only go by the BGG thread about it.
I use this on Android - https://play.google.com/store/apps/details?id=com.ViktorDikov.BetrayalCharacterStats&hl=en