I'm just not sure about the free thing, since there's conflicting information on the AppStore. It says in the description that the first three episodes are free, which includes ads. However, there is an in app purchase option of $3.99 (this is in Canada) for episode two.
Can't find the iaps. Do you have to complete a chapter to unlock the iap for the next? Btw-there are unskippable video ads.
yes , u have to finish previous episodes to unlock next ones , u can check that by taping on the episode name on the top left on the main menu screen , it will open list of all 3 episodes and when u tap on either episode 2 or 3 it will inform u to go back and finish episode 1 first , tested on my iphone