A:AnswerThe phone clamp extends pretty wide I have a Pixel 3 and itfits with extra room. The quick release also allows for alternative clamps as long as it works w quick release width screw
A:AnswerI don't know about an iPad adapter but it does have a quick release so you don't have to screw it on or off to get your camera or phone off the tripod every time.
A:AnswerYes, with the adapter. It holds my old Google Pixel XL. I know it also holds my LG V60 (which is huge) and the iPhone 11. It's a spring loaded adapter which works well!
A:AnswerOnce you loosen the roller it will allow you to pan in all directions, there is no way to lock it for just horizontal or just vertical panning.
A:AnswerFor tracking you as you move around the tripod you would be paying a ton of money more that what this little tripod costs. So, no. It does not.