The demo paper "Demo: Hybrid Data-Driven and Context-Aware Activity Recognition with Mobile Devices" by Gabriele Civitarese, Riccardo Presotto and Claudio Bettini has been accepted at the 2019 ACM International Joint Conference on Pervasive and Ubiquitous Computing (UbiComp), London 11th - 13th of September 2019. We showed our demo at the conference.