Ripped Off – CT-ART 4.0 (Chess Tactics) Review

I purchased the full version of this app in 2018. I deleted it from my phone because I took a break from chess. I just redownloaded the app and it's asking me to purchase the full version again. There is no way to contact the developer for assistance in resolving this issue, and no way to restore my previous purchase.
Review by Chosendragon on CT-ART 4.0 (Chess Tactics).