Get yourself the free presentation remote control app for LibreOffice! The LibreOffice Impress Remote is an app to interact with your slideshow presentation from your Android device - including slide previews, speaker notes, and more.
A detailed description of the prerequisites and a step-by-step user guide is available here: https://wiki.documentfoundation.org/Development/Impress/RemoteHowTo
LibreOffice is the power-packed free, libre and open source personal productivity suite for Windows, Mac and GNU/Linux, that gives you six feature-rich applications for all your document production and data processing needs: Writer, Calc, Impress, Draw, Math and Base. Support and documentation is free from our large, dedicated community of users, contributors and developers.