No idea if this is the right place to post this, since I don’t know if the problem is my OS (android 6.0), stylus (Xiron active capacitive), software, or screen. My stylus makes very jerky/wavy lines, especially when slow and diagonal. However, it works ok with the passive capacitive end of it or best just my finger. The only app that seems to smooth this is Bamboo Paper. But, I need to annotate PDFs, which bamboo cannot open. Do i have a faulty pen? Is there better software that I could use? Pics below of finger vs stylus in bamboo and adobe reader.