If you have not figured it out yet, I pay my hard earned cash for every app you see covered on this site. The liberty of paying for apps is that there is never any pressure to review an app in a positive light if I don’t feel it is worthy.
In the case of Cartoon Camera FX, the description about the app in iTunes is light and there is a reason. The feature set of the app is light as well. The app is for creating cartoon like effects with photos taken with the iPhone. Those photos can either be taken through the app or imported from your iPhone’s photo library. If using the app to take the picture, what you see is what you get, the effect is applied on the screen. Press the center bottom button to snap the photo.
Rather than taking a picture, you can select the button on the lower left corner to choose an image to use from your iPhone’s photo library.
You can apply the effects to the images via the little face button in the lower right corner of the screen. Just select one of the effects and Cartoon Camera FX returns you to the photo with the effect applied.
When you select the center checkmark button, the image is saved to your iPhone photo library. Cartoon Camera FX mentions you can share the resulting images on Facebook or as an email attachment, that doesn’t seem to be via the app rather out of your built-in photo library. The resulting image is 3264 x 2448.