I've tried 'Pickup Artist - Seduce Women'. It's not bad, but not too good either. The 'knowledge collection' is quite limited, and the categories are not so logical to me. Also, besides the categories (only 5 or 6 btw?!) there's nothing else really in the app.
I bought my Android phone (Galaxy 3) last week and since then I've been searching for good pickup apps. Yesterday I discovered brand new app called 'Dating Coach' and was pleasantly surprised with the quantity of materials in it.
All the materials are well placed into categories and subcategories. There's also a quiz with a lot of really funny and interesting questions for time killing. (for example - did you know that Fidel Castro holds all time world record for having sex with around 35.000 women?!?!

).
Maybe the best feature of 'Dating Coach' is that its content is constantly updating (without having to update app itself). The downside is that its not free - costs 1.95$ - but in my opinion it's well worth it.
If anyone can recommend any other great pickup app for Android , please do (though I've pretty much tried all I could find

)