This app was mentioned in 2 comments, with an average of 1.50 upvotes
The Witcher Fandom app (android) is really good. It basically has everything you need to know about the game.
You can also find character builds in this app, but I honestly don't think you necessarily need it. Just pick what you use the most and think will be most useful. Unless you're playing om Deathmarch maybe, because it can get difficult sometimes.
Not exactly what you are looking fore, but try this:
https://play.google.com/store/apps/details?id=com.wikia.singlewikia.witcher