Nice!

This is a simple but great app. I use it to give my brain a mini workout in the morning. Keep up the good work!

And for you people who gave negative comments about this version not having much more than the free version, youre paying to help support the developer not just for extra features! Just because hes nice enough to give away a free version doesnt mean he should get dinged because hes asking for support with this version. Stick to the free one if $1 is too rich for your blood, but come on, really, is a buck too much to ask?? Its only by paying for apps that you truly encourage the developers to keep coming out with great products!

Aragorn121 about Brain Tuner Pro