So I was hoping this would be a great app, as I'd heard good things about the Cold Turkey app for the PC, and was hoping this would be the same thing. After installing it and blacklisting about 7 or so sites, I set the timer for 3 hours and then tried to go on those sites to make sure everything was working properly. Trouble was, I could still access the sites I'd blacklisted. Instead, every other site (except Google, for some weird reason), was blocked. Sites I needed for studying, such as Wolfram Alpha, Desmos, etc., were blocked along with literally everything else. Luckily I had my phone and I could look up tips for how to bypass the app. My mac's clock is now set 3 hours ahead and everything's working properly, but needless to say I'll be uninstalling the app and won't be using it again.