Improving skills – Crazy Math Pro Review

Having only had this app for about a week, I can't tell how much it's improving my skills, but anything would be an improvement. Update from the rating above: the app is helping me to think quicker, but the amount of adds is ridiculous! One round is finished and there's almost always a five second wait between going to the next set, retrying, or finishing. Five minutes doesn't seem like a long time until you're sitting there looking at the timer count down. That needs to be fixed without having to pay for an upgrade.
Review by Price.c on Crazy Math Pro.