I am not, and I wish they would finish their windows version, because I would be in for sure.
I rarely use a phone at all. My hands are very bad with Rheumatoid Arthritis and handling a phone is in my top 10 hard things to do along with tearing plastic, opening bottles, and carrying things.
My son @bxlphabet uses it for comments, but not much with posting. He uses actifit and posts about monsters and song lyrics. None of that is helped by partiko on a phone.