Zodiac is one of THE best mentalism effects on the market and well worth the price. Although it leans heavy towards iPhone it can be used on android devices with one exception, the calculator part, which I believe is one of the better parts of Zodiac, I was disappointed that the calculator is not available for Android.
Nevertheless, it is a mind blowing effect.
I also think the books that are used needs updating since several of the books the ISBN's are outdated and no longer in print and available at Barnes and Noble. Took me 3 days of on line scouring to hunt down the ones that are not readily available and ended up having to purchase severely used books.
So if you do purchase Zodiac know that you will need to hunt down at least 4 or 5 books because they are out of print and hard to find.
Because of the out of print books and not being able to utilized Zodiacs full potential with an Android Device, I give it 4 out of 5 stars. Otherwise it is a great investment.