Here is a list of demo tutorials for PredictionIO.

Tapster iOS Demo

Similar product recommendation in an iOS Swift app built by Minh-Tu Le

URL: https://github.com/minhtule/Tapster-iOS-Demo

Tutorial: https://github.com/minhtule/Tapster-iOS-Demo/blob/master/TUTORIAL.md

NoGoodGamez

PS3/PS4 game Recommendation built by pashadude

URL: http://nogoodgamez.com

OnTapp

Beer recommendation app built by Victor Leung.

URL: http://ontappapp.com/

Writeup: http://victorleungtw.com/prediction-io/

Yelpio

Business Recommendation built by TRAN QUOC HOAN, Inhwan Lee, and 山本直人.

URL: http://yelpio.hongo.wide.ad.jp/