The original post in this thread was only about Roon as a remote on Android. That’s how I use it, and it’s worked very well for me, using Pixel 2, LG V35, and Amazon Fire HD10 tablet (the HD10 has some issues, but not Roon’s fault - see my separate thread on that).
I also have an iPad, so I’ve seen both, and while the iPad is marginally more realiable at connecting and not having to reconnect, it’s not a significant difference for me.
I particularly recommend the HD10 as a remote, since it’s often discounted under $100 and is a solid alternative to iPad. (See HD10 thread on configuration tips.)