It keeps switching back to the ad verison even though I paid for no ads pretty annoying and may be illegal
The pro version of the game removes all video interstitial ads: 30-second ads with moving images and sound. You will still see our in-game alerts letting you know about events and features, but no interstitial ads from our ad networks will be shown to you.
When you purchase the pro version, you download a separate app and you must make sure that you’re playing that version and not the Free version. The icons are the same, so it can sometimes be confusing. Sorry about that!
If it’s not possible to tell which version is which, please remove both and re-download only the paid version. If you are using the iTunes or Google Play account you used to originally purchase the app, you will not have to re-purchase it when you download it again.
Thanks, and sorry again for the confusion!