Thanks for the info. I just downloaded the app on my iPad, to check it out, there doesn't appear to be a iPhone version.
I have tried the Cognifit app and I really like it. The idea that you can play with others makes me go back often on the app. I asked their team if soon they will be adding the other games they have on their website and they told me that they will regularly add more. So we will see!
My brother had tried lots of brain fitness app. I enjoyed using his app that is made by a Japanese gaming company. I'll suggest that he should try this app soon.