This might work better as a paperback - I didn't find it great in the Kindle app.
Each kanji is presented in a large box with stroke order marked but you can't trace over the kanji because the app thinks you want to turn the page or do something else so that's not great. And then there's an example of the kanji in a word and the kanji repeated a lot of times so you can trace over it with a pencil in the paperback edition (I guess) but you can't do anything with it in the app.
There are so many free apps out there for actually practising stroke order in kanji right on the screen and this book doesn't allow that so it feels too limited to be of much use. It's not a bad book, just a bit limited in scope.