Learn your stuff
I wish I could give zero stars. After reading just a few its clear your thoughts on addiction are based on very old studies, and in some cases, drugs were a proper study has never even been done. Marijuana for instance does have known medical uses, it is a prescribed drug, it is legal in some states, there is nothing physically addictive in it. If youre going to make an app about addictions you should at least put some science, and some actual facts in it.
Qwerty hoop263 about
Drug Addiction: Alcoholics & Narcotics Companion, v2.2.5