Purely Piano is designed to help you become a better piano or keyboard player. By repeatedly practising the routines and lessons included in the software, your playing technique will improve over time. Included lesson types are Scales, Arpeggios, Chords & Warm up exercises.
It's safe to download the app. I9I LTD is the developer of Piano Learn Lessons Free Guide that can be found in the Educational category. Over 1K users downloaded the tool and its most recent update was released on Mar 23, 2016.