Nice app but could use improvement – DBT Trivia & Quiz Review

I like this app as helps me focus on appropriate thoughts. I do not like the fact it does not seem to know you purchased the upgrade, and says if you know you upgraded, just click buy again and you will not be charged again. WRONG! I have been charged twice. Very disappointing. The recent upgrade brings back all kinds so ads.
Review by Johne808 on DBT Trivia & Quiz.