Wacom Bamboo Stylus CS-600CK FineLine Precision Stylus with 1.9mm thinner tip for iPad mini, iPad 3, iPad Air and newer appliances, gray (Accessories) 4
Use your pen daily for notes on the iPad Air 2. To this end, I use the app Good Notes that works quite well for it. Slow drawn diagonal lines are wavy, that is when this technology is normal. Perhaps this can be improved via a software update.
I have tested the stylus on my other devices (Nexus 4 Android smartphone and Nexus 7 Android Tablet). Here the pen does not work at. Did I not expect otherwise, but maybe someone is interested.