Advertised as free
Alright. I had not considered that perspective. Changing my negative review to a neutral review since I was not a fan, but the reason for my chief complaint is understandable.
Response from developer
If set up as a paid application, users cannot experience it before paying. Set to in-app purchases, users can experience first, and then pay when satisfied. This is my original intention, everything is considered for the user. Sorry for the trouble.