Flimsy

Terrible graphics (well,maybe not the reason why someone buys it, but it looks like a kid of 6y put it together on a rainy Sunday afternoon), user interface is flimsy and you cannot save your drawings.
Luckily for the developer, AppStore doesnt allow returns for bad experience so he can keep the 0.99cents.

Better get a pen and paper for your curling doodles or just a doodle-app. Will work better than this app for sure.

Hullabienchen about Curling Strategy Tool, v5.1