Company Sylvia Steffien created these great apps:
Deine Eigene App - Tutorials 'für Xcode', FIFA-14 Guide, Guide for OS X-Mavericks, Xcode Tutorials - Deine Eigene App, Jahresrückblick, Craftbook Guide - "Minecraft Edition", Avoid blocks!, Soccer Data - UEFA Euro 2016/Copa América Edition, Track2GetFit - Track your workouts in the gym!, and others..