If you are serious about getting an A, find a legitimate copy of the PDF (or buy the used paperback for $10). Then, do 10 problems a day. By the time you hit problem #500, you will realize that chemistry stopped being scary and started being predictable.
The is not sexy. It is not an app. It does not have gamification. It is a gym membership for your chemistry brain. schaum chemistry 3000 solved problems pdfschaum series books